This product is a new type of intrifier, which has special good effect for the degradation of the nitrite. In the modern breeding, there are large amount of excrement to be accumulated. These organic excrement will produce large amoun of ammonia and other harmful nitrogenous substance via ammonification. Ammonia can be transformed into nitrate that can be utilized by plant via nitrification. Because there are a great quantity hetorotrophic bacteria in the breeding pool, which will havethe repulsion action to the insufficient nitrifier and prevent the nitrification, the situation will bring the accumulation of nitrite which is the middle substance of nitrification in water, the long term accumulated nitrite can debase fish and shrimpí»s disease-resistance and decrease the growth and even die. Using this product for long term, can efficiently avoid the suffocation of nitrification, promote the cycle of nitrogenous substance, avoid water quality worsen and purify water quality, reduce the rish of breeding and increase breeding benefit. 25kgs