| 摘要 |
PROBLEM TO BE SOLVED: To provide an aquarium water tank which reduces generation of an alga in a fish culture water tank, eliminates labor of frequent cleaning in the tank, and is also an excellent interior.SOLUTION: The aquarium water tank includes, separately from a fish culture water tank 2, a dirty water treatment tank 3 including a shellfish culture tank 5 and a shellfish oviposition tank 7. A pump device 12 is arranged which circulates water between the fish culture water tank 2 and dirty water treatment tank 3. Dirty such as fish excrement and residual feed generated in the fish culture water tank 2 is transferred to the dirty water treatment tank 3 together with water flow and fed to shellfish S in the dirty water treatment tank 3, to be subjected to filter treatment. Water brought into a poor nutritional state after the filter treatment is circulated to the fish culture water tank 2.SELECTED DRAWING: Figure 1 |
