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Zeolite is a kind of aluminosilicate mineral with frame structure formed by volcanic lava. At present, there are more than 50 kinds of known zeolites, and the main natural zeolites used in aquaculture are clinoptilolite and mercerized zeolite. It contains all the macroelements and most of the trace elements needed for the growth and development of aquatic animals. These elements exist in ionic states and can be used by aquatic animals. In addition, zeolite also has unique adsorption, catalysis, ion exchange, ion selectivity, acid resistance, thermal stability, multi-component and high biological activity and anti-toxicity. The cations in zeolite pores and channels also have strong selective ion exchange properties. It can remove heavy metal ions and cyanide that are harmful to animals. So that beneficial metal ions are released. It can remove 95% ammonia nitrogen in water, purify water quality, and alleviate the phenomenon of water transfer.
1.purify water, oxygenate and detoxify
Zeolite has a strong ability to adsorb ammonium nitrogen, which can reduce the ammonium nitrogen in sewage from 45mg/L to 1mg/L. Used for improving water quality, 20-30kg per mu water surface and per meter water depth, used once every 15d. Zeolite can quickly absorb various harmful gases in water (such as ammonia nitrogen, hydrogen sulfide, carbon dioxide), as well as harmful elements such as lead, mercury, cadmium, arsenic and organic substances such as phenol. When the use of drugs is excessive or the pool water is poisoned, zeolite can be used to absorb the poison and reduce the degree of poisoning.
2.adjust the pH value of the water
Zeolite powder has strong ion exchange power. Zeolite contains alkali metals and alkaline earth metals and the anions in the solution form precipitates, while the original metal cation position in the lattice is occupied by H+ released from the water, so that the OH- in the solution is increased to keep the water body alkaline, which is conducive to the growth of aquaculture animals.
3.for the construction of fish pond material
There are many molecular pores inside the zeolite powder, with a strong adsorption capacity, people in the dressing of the fish pond, can use the bottom layer of yellow sand, the upper layer of the zeolite with cation and ion exchange ability and adsorption of harmful substances in the water, so that the fish pond water color all year round to maintain green bean or yellowish green, can promote the rapid and healthy growth of fish, improve the economic benefits of farming.
4. Promote algae reproduction
When zeolite powder is added to the water, carbon dioxide is also brought into the water. After the pores and channels of zeolite absorb enough water, carbon dioxide is free in the water, providing sufficient carbon source nutrition for algae growth and reproduction. At the same time, zeolite also provides substances needed for algae growth and reproduction, so it can promote algae reproduction. According to the data, adding 20mg/L zeolite powder to the cultured water body, the photosynthetic intensity of the experimental group was increased by 17% compared with the control group, reaching the best value.
5. improve the survival rate of transportation
Carp species were transported in nylon bags, 1.8 grams of artificial zeolite (particle size 40-60 mesh) was added to each liter of water, and the survival rate of fish species was up to 99% when the water temperature was about 25 ° C. Under the same conditions, transport density increased by 20%, the survival rate can reach 80%.
6. as a bait additive
Zeolite powder contains a variety of macroelements and trace elements necessary for the growth and development of fish, shrimp and crab, these elements mostly exist in the form of exchangeable ions and soluble bases, which are easy to be absorbed and utilized, and also has a variety of catalytic effects of biological enzymes. Therefore, the application of zeolite in fish, shrimp and crab feed has the function of promoting metabolism, promoting growth, enhancing disease resistance, improving survival rate, regulating animal body fluids and osmotic pressure, maintaining acid-base balance, purifying water quality, and certain anti-mildew effect. The amount of zeolite powder in fish, shrimp and crab feed is generally between 3-5%.
