Entrapping immobilization pellets for purifying breeding water, process and apparatus for purifying breeding water, and aquarium set

1. Entrapping immobilization pellets for purifying breeding water in an aquarium to breed aquatic animals, the pellets comprising an aqueous polymer gel comprising:

an immobilizing material selected from the group consisting of polyacrylamide, polyvinyl alcohol, polyethylene glycol, sodium alginate, carageenan, and agar;

a polymerization accelerator comprising N, N, N′, N′-tetramethylethylenediamine; and

a colorant comprising a pH indicator that indicates a pH of the pellets by changing color,

wherein microorganisms are entrapped and immobilized in the aqueous polymer gel and

wherein the entrapping immobilization pellets contain an algaecide.

2. The entrapping immobilization pellets for purifying breeding water according to claim 1 , wherein the microorganisms contained in the entrapping immobilization pellets are nitrifying bacteria.

3. An aquarium set comprising: the entrapping immobilization pellets according to claim 2 in an aquarium to breed aquatic animals.

4. A process for purifying breeding water in an aquarium to breed aquatic animals, the process comprising:

bringing the breeding water to breed aquatic animals into contact with the entrapping immobilization pellets according to claim 1 to purify the breeding water.

5. An apparatus for purifying breeding water in an aquarium to breed aquatic animals, the apparatus comprising:

a transparent purification tank having an intake port to take in breeding water in the aquarium and a return port to return the purified breeding water into the aquarium;

the entrapping immobilization pellets according to claim 1 provided in the purification tank; and

an air supply device to supply air into the purification tank.

6. The apparatus for purifying breeding water according to claim 5 , wherein aquarium lighting is provided in the purification tank.

7. An aquarium set comprising:

an aquarium to breed aquatic animals;

the purification apparatus according to claim 6 placed outside the aquarium;

an intake pipe that makes the inside of the aquarium communicate with the intake port of the purification apparatus to take in the purification apparatus breeding water in the aquarium;

a return pipe that makes the return port of the purification apparatus communicate with the inside of the aquarium to return into the aquarium the breeding water purified in the purification apparatus; and

a circulation device to circulate the breeding water between the aquarium and the purification apparatus.

8. An aquarium set comprising: the purification apparatus according claim 5 placed in an aquarium to breed aquatic animals.

9. An aquarium set comprising:

an aquarium to breed aquatic animals;

the purification apparatus according to claim 5 placed outside the aquarium;

an intake pipe that makes the inside of the aquarium communicate with the intake port of the purification apparatus to take in the purification apparatus breeding water in the aquarium;

a return pipe that makes the return port of the purification apparatus communicate with the inside of the aquarium to return into the aquarium the breeding water purified in the purification apparatus; and

a circulation device to circulate the breeding water between the aquarium and the purification apparatus.

10. An aquarium set comprising: the entrapping immobilization pellets according to claim 1 in an aquarium to breed aquatic animals.

11. The entrapping immobilization pellets for purifying breeding water according to claim 1 , wherein the entrapping immobilization pellets have a phosphorous content of 0.05 mass % or less.

12. The entrapping immobilization pellets for purifying breeding water according to claim 1 , wherein an amount of pH indicator being 0.01 to 2 mass % based on the entrapping immobilization pellets.