JP2618330B2 - Seawater fish aquarium equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ornamental aquarium apparatus for breeding seawater fish while watching it.

[0002]

2. Description of the Related Art In recent years, marine aquariums have been calling for a quiet boom, but they feel relaxed and stretched open when swimming fish. As described above, ornamental fish combine with the vividness of color and the sensation of movement to create a unique atmosphere, and are therefore increasingly used not only as pets but also as one of interiors. Against this background, recently, as an expectation of an aquarium at home, an increasing number of families breed tropical fish in a small aquarium and watch it. The ornamental fish does not take up space, does not smell, does not squeal, is also beautiful in appearance, and is ideal for pets.

[0003] By the way, among fresh fish, many freshwater fish are kept, but seawater fish is not kept unexpectedly. Originally,
Although saltwater fish have a primary color of colorfulness and are extremely agile and active in movement, they are much more suitable for ornamental use than freshwater ones, but their spread is still far behind.

[0004] The reason is that marine fish generally grow in an environment containing salty water, so that the amount of dissolved oxygen is small.
This is because bacteria that dislike oxygen are prone to propagate. The generation of bacteria that dislike oxygen, ie, anaerobic bacteria, converts decay products and the like produced by the effluent into highly toxic sulfides. For this reason, it is necessary to minimize the occurrence of anaerobic bacteria when breeding saltwater fish in ornamental aquariums for long periods of time. For this purpose, it is necessary to manage troublesome water quality and water temperature. It must be troublesome. As described above, it is difficult to use seawater fish for ornamental purposes because there is a problem in the rearing method. By the way, in order to breed marine fish for a long period of time, it is necessary to create a livable environment that fish originally like,
Importantly, a livable environment is, specifically, an environment in which the causes of fish death have been eliminated as much as possible.

Next, the causes of death of saltwater fish will be described. 1. 1. Abnormality of specific gravity (salinity) (out of range from 1.016 to 1.024) 2. Abnormal water temperature (a) Outside the range of 20-30 ° C (b) Rapid change in water temperature 3. Abnormal pH 7.5 out of range 8.2 Lack of food 5. Excessive breeding number (a) Number of fish exceeding the limit of the allowable number of fish in the aquarium (b) Fish of a size exceeding the limit of the allowable volume of fish in the aquarium 6. Deterioration of water quality (a) Contamination of impurities (b) Generation of ammonia (c) Generation of nitrous acid (d) Generation of toxic gas by anaerobic bacteria Lack of oxygen 8. Trouble between fish (predation, fight, cannibalism, etc.) Occurrence of disease (a) White spot disease (f) Udynium (b) Lymphocystis (g) Eating phagocytosis (c) Trichodina (h) Parasite (d) Tail rot (li) Built-in disease (e) Popeye

[0006] Among the above causes of death, 90 to 9
5% means 6. (B) generation of ammonia, which deteriorates water quality,
(C) generation of nitrous acid, and (d) generation of toxic gas by anaerobic bacteria; The occurrence of the disease (a) white spot disease. The former 6. (B), (c) and (d) can be solved by improving the filtration system and utilizing aerobic bacteria, and the latter (9). (A)
Similarly, improvements in filtration systems or other treatments with drugs can be sufficient.

Therefore, most of the causes of death can be eliminated by improving the filtration system. That is, 6. To prevent (b) the generation of ammonia and (c) nitrite, an environment that generates aerobic bacteria should be set up because aerobic bacteria change them into non-toxic ones. I just need. (D) To prevent the generation of toxic gas by anaerobic bacteria,
It is necessary to eliminate anaerobic bacteria. Conversely, since anaerobic bacteria dislike oxygen, it is important to establish an environment in which aerobic bacteria that prefer oxygen are generated. Note that 9. (A) White spot disease is a disease caused by the infestation of unicellular ciliates, and has the habit of exploding at the bottom of the water. It is important to create an environment that does not allow the pathogen, unicellular ciliates to invade.

From the above, it can be understood that it is particularly important to breed marine fish by adopting a downward circulation method and setting an environment in which aerobic bacteria can easily grow. Therefore, various methods such as a bottom filtration method, an upper filtration method, a closed filtration method, an overflow filtration method and the like have been developed as a filtration method for a water tank (for example, see JP-A-63-151323). However, in terms of aerobic bacteria's reproductive properties, no satisfactory one has yet been developed.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a saltwater fish ornamental aquarium capable of setting an environment in which aerobic bacteria can easily grow.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve such a problem. As a result, in addition to the bottom filtration in the water tank, a filter unique to an external filter other than the water tank is used. Thus, the present inventors have found that the propagation of aerobic bacteria can be surely promoted, and based on this finding, have completed the present invention.

That is, the present invention comprises (1) a filter system apparatus B having two different filtration tanks and a water tank A mounted on the filter system apparatus, wherein the water tank has a sandy state containing calcium. A bottom filtration device having a raised bottom with a fine hole using a filter material as a filter medium, an overflow frame provided with a drainpipe in the corner of the water tank is provided, and water passing through the bottom filtration device is directly After ascending through the overflow frame, it falls through the droppipe and resides in the seawater fish aquarium device sent to the filter system device B.
And (2), the filtration tank of the filter system device is:
The first stage is a seawater fish ornamental water tank device according to the above (1), wherein the first stage is a filtration tank using ceramic as a filter medium, and the second stage is a filtration tank using sand-like material containing calcium as a filter medium. Also, (3) the sandy fish is a saltwater fish ornamental aquarium apparatus according to the above (1) or (2), wherein the sandy substance is coral sand having a grain size of 2.5 mm to 3.5 mm. Further, (4) the filter system apparatus is provided in the saltwater fish ornamental aquarium apparatus of (2) above, which is provided with a sterilizer. And (5),
In the filter system device, the seawater fish ornamental water tank device according to the above (2), wherein an air stone for performing aeration is disposed between the first-stage first-stage filtration tank and the second-stage second-stage filtration tank. . (6) The seawater according to (2) above, in which a mesh-like sheet finer than the filter material is placed on a punch plate as a support for the filter material of sand containing calcium in the filter system device and the bottom filtration device. Present in fish aquarium equipment.

[0012]

The water in the water tank A flows into the bottom space P so as to stroke the sand surface of the sandy body containing calcium at the bottom and evenly across the entire bottom surface. Next, the water is tank A
Is sent to a filter system device attached to and provided below. Here, a filtering operation is performed by the first-stage filtration tank, and then a different filtering operation is performed by the second-stage filtration tank.

[0013]

Embodiments will be described below with reference to the drawings. FIG.
1 shows an entire ornamental aquarium apparatus for breeding saltwater fish according to an embodiment of the present invention. Aquarium A is a rectangular parallelepiped of 4
One surface is covered with a transparent side plate A1 made of glass, acrylic such as plastic, or the like, so that seawater fish can be viewed from four directions. Side plate A on bottom plate A2
1 is fitted and sealed with packing (not shown) or the like to form a container for storing water. At the bottom of aquarium A,
The punch plate 1 is installed at a distance of about 35 mm from the bottom surface (upper surface of the bottom plate) to form a raised bottom. The distance from the bottom surface is usually in the range of 20 to 50 mm.

The punch plate 1 has an upper plate and a side plate, and has a shape in which a receiving box body is turned upside down. A bottom space P is formed between the bottom surface of the water tank and the punch plate 1. It is formed. The upper surface of the punch plate 1 is covered with a metal or plastic mesh sheet 2 of about 2.5 mm mesh. On the mesh sheet 2, coral sand 3 which is a sandy substance containing much calcium is provided. Are integrated. The coral sand 3, the punch plate 1 and the mesh sheet 2 constitute a so-called bottom filter in a water tank. Here, the reason why coral sand is selected as the sand containing calcium is that coral sand has a large surface area and contains a large amount of calcium, and is therefore most suitable as the sand of the present invention. Coral sand 3 is 30-50
mm thickness and evenly spread
Since the mesh of the mesh sheet 2 is set smaller than the coral sand 3, it does not fall down. The punch plate 1 is provided with a small hole 1A having an inner diameter of 3 to 5 mm every 8 to 10 mm in the upper plate and the side plate by a design in consideration of ordinary water circulation. Coral sand 3
Is placed, so it has enough strength to withstand it.

The punch plate 1 has a role of forming a raised bottom to form a bottom space P at the bottom of the water tank A, and also allows water flowing through coral sand or the like to freely escape downward. Have. The coral sand 3 used in the present invention has a grain size of 2.5 mm to 3.5 mm. (The size of the coral sand and the sand-like material in the present invention means the outer diameter of the grain. ), Preferably around 3 mm. 3mm
By passing through a slightly larger eye sieve and a slightly smaller eye sieve, an outer diameter of approximately 3 mm is obtained.

Since the size of the coral sand 3 is important as a filtering property, this point will be described here. The inventors initially did not care about the size of the sand containing calcium at all, and said that the larger the grain size of the sand, the more clogging of the sand would be prevented. From the point of view, make it as large as possible 5 so that it is easy to wash
Coral sand, which is a coarse sandy substance having a grain size of about 8 mm, was used. However, because of this size, the space between sandy materials has room, so surprisingly, feed and excrement enter the gaps in the coral sand and get clogged, and water does not flow there and it does not clog A phenomenon occurs in which water bypasses and flows through the part.

[0017] Then, since the clogged portion is stagnated, rot occurs there, and as a result, many anaerobic bacteria multiply and cause toxic gas to accumulate.
Then, the inventors tried several experiments and found that 3 mm
It was found that the average size allowed the water to pass through the layer of coral sand without skewed water flow and clogging of excrement. By the way, the bottom space P1
The water that has entered exits from the hole 4A of the overflow frame 4 and rises again to flow below the top 5A of the drain pipe 5. And a filter system device B provided under the water tank A
Sent to The water flowing into the filter system device B is filtered through the device and finally returned to the upper water tank. At this time, the pumping power of the pump at a normal circulation speed suitable for breeding is increased. The range is set based on the range (1.5 to 2 rotations of aquarium water / 10 minutes) and the pumping power is naturally limited, so that it cannot be increased unnecessarily.

Assuming that the coral sand 3 has a coarse grain larger than 3 mm, in the breeding aquarium set at the normal circulation speed, the hole 4A of the overflow frame is provided at the corner of the aquarium, so that the negative pressure is reduced. Does not act evenly on the entire bottom space, but is concentrated on the vicinity of the hole 4A and greatly applied. As a result, the suction force becomes weaker at a position away from the hole 4A. Therefore, the water circulates only from the top to the bottom only around the hole 4A, and the more distant the portion becomes, the more the water circulates.

As a result, stagnation occurs in the flow away from the hole 4A, and the water circulation efficiency becomes extremely poor. Therefore, in order to prevent this, when the coral sand 3 is loaded on the punch plate, the coral sand is thickened around the hole 4A of the overflow frame 4 and becomes thinner as the distance increases. It was necessary to set up and lay down. However, when the coral sand 3 has a size of 2.5 to 3.5 mm (particularly preferably about 3 mm) as in the present invention, the suction force is applied on average as a whole, and the circulation form is not biased and stagnation does not occur. As a result, the harmful anaerobic bacteria do not grow. Also, the coral sand 3 can be spread on the bottom of the water tank A without having to incline it.

As described above, from the viewpoint of excrement and water circulation, the size of the coral sand 3 is 2.5 to 3.5 mm, particularly preferably 3 mm. This is extremely convenient as an aquarium. As a proof to show this point, Experimental Example 1 will be described later. As the thickness of the coral sand 3 to be spread, less than 5 cm is adopted,
It is preferably 3 to 5 cm, and if it is 5 cm or more, the bacteria eat and consume oxygen, and the dissolution rate of oxygen exiting there is low, which is not appropriate.

On the other hand, an overflow frame 4 is provided at a corner of the water tank A, and a waterfall pipe 5 is provided therein. The waterfall pipe extends to a first filtration tank 7 of a filter system device B described later. Have been. Also overflow frame 4
A plurality of oil film removing holes 4C for removing an oil film floating on the water surface W in the water tank are formed at the water surface position of the water tank, and the oil film flows into the overflow frame through the holes, and immediately thereafter, the top 5A of the water pipe. Then, it flows down to the filter system B and is purified. The water that has entered the bottom space P exits from the hole 4A of the overflow frame 4 of the water tank, rises again, flows down through the top 5A of the water drop pipe 5, and falls down, and is provided with a filter system B device provided below the water tank A. Sent to Filter system device B
Has a function of further filtering the water in the water tank A from the outside of the water tank. The water tank A is mounted on the frame B1 of the filter system device B. Since the filter system device B is placed under the water tank A and there is no obstacle on the upper part of the water tank, when the water tank is viewed, it can be seen from a very wide range, and the field of view is widened. The filter system apparatus B mainly includes a filter apparatus C (consisting of a first-stage first-stage filtration tank 7 and a second-stage second-stage filtration tank 8), a sterilizer D, and interconnects them. Water pipe 12
Etc.

The filter device C comprises a first-stage filtration tank and a second-stage filtration tank.
A filter tank plate 7A is provided in a container plate C1 including a step filtration tank.
And a filtration tank plate 8A are provided as partitions, and a first-stage filtration tank 7 and a second-stage filtration tank 8 are separately provided in parallel. The first-stage filtration tank 7 includes a container plate C1, a filtration tank plate 7A, a punch plate 7C, a ceramic filter medium 7B, and the like. The punch plate 7C is formed with a foot in a flat plate shape or a receiving box shape, and is provided with a small hole. The small hole is formed with the punch plate at the bottom of the water tank by the design in consideration of the circulation efficiency of the entire filtering device. It is provided in the same way. Directly above this punch plate, a ceramic filter medium 7B is about 50 to 80 m.
m thick and stacked. Since the filtering effect of the ceramic filter medium is not so different depending on the size thereof, unlike the coral sand, the size of the ceramic filter medium is set so as not to fall through the fine hole of the punch plate normally used as described above (preferably about 1 mm).
(About 0 mm), it is simply placed on the punch plate and does not require a mesh sheet. The ceramic filter medium 7B is washed when necessary (about once a month). In this case, the punch plate 7C can be easily taken out together with the outside by washing the punch plate 7C. The ceramic filter medium 7B is for improving the PH as a filtration function, and it is not possible to expect a sufficient increase in the PH only by filtration at the bottom of the water tank. In order to maintain the temperature in the range of about 8.3, it is necessary to supplement the filtration by the ceramic filter medium 7B. Of course, filtration by the ceramic filter medium 7B is mainly for improving PH, but it goes without saying that it also has a biological filtration function.

The water that has passed through the ceramic filter medium 7B passes through the small hole of the punch plate 7C and reaches the first lower space P1. The water that has reached the first lower space P1 then exits through the outlet 7D, rises again, and flows in from the upper end of the next second-stage filtration tank. An explosive device for performing aeration, for example, an air stone 10 or the like is disposed between the first-stage filtration tank 7 and the second-stage filtration tank 8 to supply sufficient dissolved oxygen. Further, a heater sensor 9 is arranged, and the water temperature is maintained at an optimum temperature by a thermostat.

The second-stage filtration tank 8 includes a container plate C1, a filtration tank plate 8A, a punch plate 8C, a mesh sheet 8D, and a coral sand 8
B and the like. The punch plate 8C is formed in a flat plate shape or a receiving box shape with feet, and has a small hole formed in its entirety. This small hole is the same as the punch plate at the bottom of the water tank described above by a design considering the circulation efficiency of the entire filtering device. It is provided as follows.
A metallic or plastic net-like sheet 8D is laid on this, and then coral sand 8B is loaded in a thickness of about 50 to 80 mm. The coral sand 8B is washed when necessary (approximately once a month).
By lifting C, it can be easily taken out together with it and washed. As described above with coral sand at the bottom of the aquarium, the coral sand grains are about 3 mm in size, but the fine holes in the punch plate are larger than that in terms of circulation efficiency. Therefore, the coral sand falls down through the small hole only with the punch plate. Therefore, the mesh sheet 8D of a mesh slightly smaller than the coral sand 8B is laid on the punch plate 8C, and the coral sand 8B does not fall down from the small holes of the punch plate 8C.
The coral sand 14 efficiently performs a biological filtration action of breeding aerobic bacteria and changing toxic substances.

In the second-stage filtration tank 8, since the coral sand 8B is below the water surface w, it is placed in exactly the same state as the coral sand loaded on the raised bottom in the water tank as described above. The manner of filtration in the second-stage filtration tank is also substantially the same. The water that has passed through the coral sand 8B passes through the small hole of the punch plate 8C and reaches the second lower space P2. After reaching the second lower space P2, it is then raised by the pumping force through the first water pipe 12 and sent to the sterilizing apparatus D, where the microorganisms and the like are sufficiently sterilized by the optical sterilizing action. Since the water after satisfying the three conditions of the improvement of PH by the ceramic filter medium, the improvement of the dissolved oxygen rate by aeration, and the biological filtration by coral sand is sterilized, the sterilization effect is extremely excellent. It will be. After exiting the sterilizer D, the water rises again through the second water pipe 6 and is discharged from the jet port 6A located near the water surface W of the water tank.

What is important in the present invention is that the aquarium apparatus has three filtration steps as a whole and has a unique arrangement, so that it has a very efficient filtration function. . That is, the water in the aquarium device is first filled with coral sand 3
Bottom filtration of water tank → Ceramic filter medium 7B of first stage filtration tank (wet method) → Coral sand 8B of second stage filtration tank (wet method), mainly biological filtration action → PH improvement → organism The filtering action is continuously performed, and the two conditions of the required stable and improved pH and sufficient aerobic bacterial growth can be satisfied. Furthermore, the first-stage filtration tank 7
Since the aeration using the air stone 10 is performed between the second filtration tank 8 and the water, the biological filtration is performed by coral sand on the water having sufficiently improved dissolved oxygen rate, As a result, extremely favorable conditions are obtained for the propagation of aerobic bacteria (see FIG. 4). The circulation pump 11 circulates water from the water tank A to the filter system device B, and its position may be provided in a part of the circulation passage.

Next, the step of circulating the water in the water tank A will be described. First, when the pump 11 is activated, the water in the water tank A passes by stroking the sand surface of the coral sand 3 at the bottom thereof,
In addition, it passes through the entire bottom surface evenly, and flows into the bottom space P1 through the small hole 1A of the punch plate 1. In this process, nitrogen compounds are decomposed by aerobic bacteria propagated in the coral sand 3 (biological filtration action). Next, after flowing into the bottom space P <b> 1, it flows out of the hole 4 </ b> A of the overflow frame 4, rises once, and flows downward from the top 5 </ b> A of the water pipe 5. The water that has flowed in is spouted from the spout 5B of the dropping pipe to the first-stage filtration tank 7 of the filter system device B provided below the water tank A. The PH is improved while passing through the ceramic filter medium 7B, and reaches the lower space P1 thereunder through the punch plate 7C (PH improving action). Then, the air stone 10 goes out of the lower space P1 to perform aeration, and the heater sensor 9 adjusts the temperature optimally. After that, it passes over the filtration tank plate 8A of the second filtration tank and enters the tank. Here, the coral sand 8B passes the surface of the coral sand 8B so as to be stroked, and evenly passes over the entire bottom surface, and flows into the bottom space P2 through the small hole of the punch plate 8C. Thereafter, it exits from the outlet 8E, ascends through the first water pipe 12 by the circulation pump 11, is sent to the sterilizer D, and is sufficiently sterilized against microorganisms and the like by the sterilization action of light (sterilization action). ). After exiting the sterilizer D, the water rises again through the second water pipe 6, and is discharged from the jet port 6A located near the water surface of the water tank. Here, the reason why the liquid is discharged from the vicinity of the water surface is to ensure circulation without avoiding sludge and the like settled on the bottom surface again. The discharged water is also subjected to bottom filtration by the coral sand 3 at the bottom, and the above-described operation is repeated.

As described above, the present invention is capable of other various modifications without departing from the essence thereof. In that sense, the examples are illustrative, and are not to be construed as limiting in any way. For example, the sand of the bottom of the water tank and the two-stage filter device is:
Not only coral sand but also at least one containing calcium is sufficiently applicable.

(Experimental Example 1) Four water tank devices (size of upper water tank: 1200 mm × 600 mm × 600 mm) having a filter system device in the lower part as shown in FIG. 1 of the embodiment were prepared. The first aquarium device is a sandy material having a size of 3 mm and containing calcium (here, 3 mm coral sand) as a filter medium for the bottom of the aquarium and a two-stage filtration tank of the filter device.
Tank device using a water tank device (a); the second tank device is a sand-like material containing calcium (5 mm in this case) having a size of 5 mm as a filter medium for the bottom of the water tank and a two-stage filtration tank of the filter device. Aquarium device using coral sand) [Aquarium device (b)] The third aquarium device is a sandy material containing calcium, which is 7 mm in size, as a filter medium for the bottom of the aquarium and a two-stage filtration tank of a filter device. (Here 7mm coral sand)
Aquarium device using water [aquarium device (c)] The fourth aquarium device is a sand-like material containing calcium (2 mm in this case) having a size of 2 mm as a filter medium of the bottom of the aquarium and a two-stage filtration tank of a filter device. Aquarium device (aquarium device (d)) using coral sand). Drop the ink droplets on the above-mentioned water tank device (a), the water tank device (b), the water tank device (c), and the water tank device (d), and the circulation speed of the water tank device is 1.5 rotation /
The state of water passage was visually observed for 10 minutes. FIG. 3 (a) schematically shows the state of flow at the bottom of the water tank device (a). In the water tank apparatus (a), it was observed that the water passed uniformly through the entire raised bottom (punch plate) and the circulation was uniform. FIG. 3 (b) schematically shows the state of the flow at the bottom of the water tank device (b). In the water tank device (b), it was observed that the passage was faster near the hole of the overflow frame, and the passage was slower as the hole was further away. FIG. 3 (c) schematically shows the state of the flow at the bottom of the water tank device (c). In the aquarium device (c), the flow of the aquarium device (b) is slightly exaggerated, and the passage closer to the hole of the overflow frame is faster, and the further it is, the slower the passage becomes. Was observed. FIG. 3D schematically shows the flow state at the bottom of the water tank device (D). In the water tank apparatus (d), it was observed that the entire tank was clogged and the passage was extremely poor. (Experimental example 2) A water tank device having a filter system device on the upper part as in the embodiment (upper tank size 1200
mm × 600 mm × 600 mm). The first water tank apparatus is a sand tank containing calcium of 3 mm in size (herein, a filter medium of a bottom filter of a water tank and a filter medium of a second-stage filter tank of a filter apparatus) in the same water tank apparatus as that of FIG. Aquarium apparatus using 3 mm coral sand) [aquarium apparatus (e)] The second aquarium apparatus is an aquarium apparatus (e)
, The filter materials of the first and second filtration tanks were exchanged and reversed, that is, a water tank device using a coral sand in the first filtration tank and a ceramic filter material in the second filtration tank [water tank device (f)], 3 The first water tank apparatus is a water tank having only a bottom filtration function without a filter device in FIG. 1, that is, a filter medium is not used for the first-stage filtration tank and the second-stage filtration tank. Was used as a water tank apparatus (water tank apparatus (g)) using a sand-like substance having a size of 3 mm and containing calcium (here, coral sand of 3 mm), and the pH of the water was adjusted to 7.8. FIG. 8 shows the use state of the filter medium of each water tank device. Each tank device was filled with 50 sparrows (fish names), and the circulation speed of the tank was set at 1.5 rotations / 10 minutes, and filtration was continued. Then, in order to check the effect of the filtration, the concentrations of ammonia and nitrite in water were measured for 100 days, and the results were recorded. FIG. 5 is a diagram showing changes over time of the ammonia and nitrous acid in the water tank device (e). As can be seen, for the tank device (e), ammonia was as early as day 40 and nitrite was 4 days.
It became 0 on the fifth day. As for the fish, all the fish were extremely vibrant even after 100 days, and were swimming around in the aquarium lively.

FIG. 6 is a diagram showing the change over time of ammonia and nitrous acid in the water tank apparatus (f). As can be seen, for the water tank apparatus (f), ammonia became zero on day 45 and nitrous acid on day 50. As for the fish, all the fish were alive even after 100 days and were swimming around in the aquarium. Fig. 7 shows an aquarium device (g)
FIG. 3 is a diagram showing a change over time of ammonia and nitrous acid in FIG. As can be seen, for the water tank apparatus (g), ammonia peaked on day 35 and then decreased to zero on day 65. Nitrite continued to increase even after the ammonia peaked, peaking at 6 PPM on day 45, then decreasing and remaining slightly (0.25 PPM) on day 100. For fish, 100
All the fish were alive on the day, but their movements were a little less agile and the colors were somewhat dull.

[0031]

According to the present invention, sufficient filtration of aerobic bacteria can be ensured by the filtration at the bottom of the aquarium and the two-stage filter provided in the filter system provided below the aquarium.
An environment suitable for breeding saltwater fish is set.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an aquarium apparatus according to an embodiment of the present invention.

FIG. 2 is an external view of an aquarium apparatus according to an embodiment of the present invention.

FIG. 3A is a diagram schematically showing a state of a flow at the bottom of the water tank device (A). FIG. 3B is a diagram schematically showing the state of the flow at the bottom of the water tank device (B).
FIG. 3C is a diagram schematically showing the state of the flow at the bottom of the water tank device (C). FIG. 3D is a diagram schematically showing the state of the flow at the bottom of the water tank device (D).

FIG. 4 is a block diagram showing functions of the aquarium apparatus of FIG. 1;

FIG. 5 is a diagram showing a change over time of ammonia and nitrous acid in a water tank device (e).

FIG. 6 is a diagram showing a change over time of ammonia and nitrous acid in a water tank device (f).

FIG. 7 is a diagram showing a change over time of ammonia and nitrous acid in a water tank apparatus (g).

FIG. 8 shows a use state of a filter medium of each water tank device in Experimental Example 2.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Raised bottom (punch plate) 1A Fine hole 2 Reticulated sheet 3 Coral sand 4 Overflow frame 4A Hole 4C Oil film hole 5 Dropping pipe 5A Top 5B Spout 6 Second water pipe 6A Spout 7 First-stage filtration tank 7A Filtration tank Plate 7B Ceramic filter material 7C Punch plate 7D outlet 8 Second-stage filter tank 8A Filter tank plate 8B Coral sand 8C Punch plate 8D Mesh sheet 8E Outlet 9 Heater sensor 10 Air stone 11 Circulation pump 12 First water pipe A Water tank A1 Side plate A2 Bottom plate B Filter system device B1 Frame C Filter device C1 Container plate D Sterilizer P Bottom space P1 Lower space P2 Lower space w Water surface W Water surface

Claims (6)

(57) [Claims] 1. A filter system apparatus B having two different filtration tanks and a water tank A mounted on the filter system apparatus, wherein the water tank has a fine hole made of a sandy material containing calcium as a filter medium. A water tank comprising a bottom filtration device having a raised bottom;
An overflow frame with a drainpipe inside is installed in the corner of
The water that has passed through the bottom filtration device is directly
After ascending through the baffle frame, passing through the drainpipe
An aquarium apparatus for watching seawater fish, which falls and is sent to the filter system apparatus B. 2. The filter tank of the filter system device comprises:
The aquarium apparatus for ornamental seawater fish according to claim 1, wherein the first stage is a filtration tank using ceramic as a filter material, and the second stage is a filter tank using sand-like material containing calcium as a filter material. 3. The method according to claim 1 , wherein the sandy material has a particle size of 2.5 mm to 3.5 mm.
The aquarium device for ornamental saltwater fish according to claim 1 or 2 , wherein the coral sand is a size of coral sand . 4. The aquarium apparatus for ornamental saltwater fish according to claim 2, wherein the filter system apparatus includes a sterilizing apparatus. 5. The filter system device according to claim 2, wherein an air stone for performing aeration is disposed between the first-stage first-stage filtration tank and the second-stage second-stage filtration tank. An aquarium device for ornamental saltwater fish as described in the above. 6. A net-like sheet having a mesh smaller than the filter medium is placed on a punch plate as a support for a filter medium of a sand-like substance containing calcium in the filter system apparatus and the bottom filtration apparatus. An aquarium device for ornamental saltwater fish as described in the above.