Entrapping immobilization pellets for purifying breeding water in an aquarium to breed aquatic animals, wherein the entrapping immobilization pellets have a phosphorus content of 0.05 mass % or less....http://www.google.com.au/patents/US7897042?utm_source=gb-gplus-sharePatent US7897042 - Entrapping immobilization pellets for purifying breeding water, process and apparatus for purifying breeding water, and aquarium set
