Adding 5.0%( 150 mesh) clinoptilolite powder to grass carp feed for 2 reams can increase the survival rate of grass carp by 14.0%, the relative growth rate by 10.8%, the feed coefficient by 0.28, and the intestinal protease activity of grass carp by 27.0%, but the hepatopancreatic protease activity is not affected. There was no adverse effect on blood biochemical indexes such as BUN, alanine aminotransferase (GBT), creatinine (CR), cholesterol (ch), total triglyceride (TG) and grass carp meat quality.

Using 50kg zeolite powder (200 mesh) at the water depth of per mu 1 m can remove 95% ammonia nitrogen in water, purify water quality and alleviate water diversion (Li Songxun 1993). When the total amount of ammonia nitrogen in the shrimp pond reaches more than twice the allowable content, that is, 1.2mg/L/L, the ammonia nitrogen content in the pond water can be reduced to a safe concentration after zeolite 16mg/L treatment. When zeolite is used as a water quality improver, the general dosage of seawater is 80ppm and that of fresh water is 15ppm.

Extended data:

Matters needing attention

1, the specifications of zeolite powder should be selected according to the use. If it is used for water quality improvement, the specification of 180 mesh to 200 mesh should be used.

2, high-quality zeolite powder, natural zeolite content should reach more than 50%.

3. Ammonia absorption value is an important quality index of zeolite powder. The ammonia absorption value of qualified zeolite powder is generally greater than 100mg equivalent/100 g. Using 25-50 kg zeolite powder per mu per meter of water depth can remove 95% of ammonia nitrogen in water, purify water quality, increase dissolved oxygen, improve total alkalinity of water body and stabilize water quality.

Concrete admixture: Zeolite powder contains a certain amount of active silica and silica trioxide, which can react with calcium hydroxide, a hydration product of cement, to form a cementitious substance.

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