In recent years, some farmers have blindly increased their stocking density in pursuit of fish production, resulting in the gradual increase of harmful substances such as residual baits and excrement in the pool. The water body becomes increasingly eutrophic, resulting in a large amount of harmful algae, resulting in deterioration of water quality. The growth of fish, in severe cases, causes death from fish poisoning. After many years of aquaculture production practice, the authors summarized effective ways to remove harmful algae from fish ponds.
1, before stocking, use dry lime for dry clear pond. The dosage is 70kg to 80kg per mu. For ponds with poor sediment quality, apply organic manure, 150kg to 250kg per mu, to cultivate dominant populations of algae so that they can be used in submerged ponds.
2. The most likely pests in aquaculture water are Spirogyra, Microcystis aeruginosa and Microcystis sp.
When water is found in pool water, it can be sprayed with vegetation ash. When the microcystis aeruginosa and microcystis aeruginosa multiply, the water body turns dark green. The solution is to constantly change the new water in the hot season. Raise a certain amount of tilapia. Quanchiposa copper sulfate solution, so that the pool of copper sulfate concentration of 0.7ppm, 2 days after changing the water 1 / 2 can effectively control the algae; when the pool water polydyne, naked dinoflagellate mass reproduction, due to its sensitivity to environmental changes It can suddenly change its aquatic environment and cause it to die, then change the water to eliminate dead algae.
3, matters needing attention:
1 Copper sulfate is a heavy metal salt, and its use is affected by the pool water temperature, pH and hardness. The higher the water temperature, the greater its toxicity, and the higher the hardness and pH, the lower its toxicity. Do not use metal containers when dissolving copper sulphate. The water temperature during dissolution should not exceed 60°C, otherwise copper sulphate will fail. When applying copper sulphate, the entire pond cannot be fertilized for 7 days before and after spraying, and quicklime cannot be applied.
2 The use of drugs, it is best to choose at 9 am on sunny days.
3 Because copper sulphate is prone to phytotoxicity when used, copper complex is used as much as possible. It has little toxicity and is not affected by PH, organic matter, ammonia, etc. in the water. When the algae is killed, 0.5 ppm to 0.8 ppm of Quanchiposa can be used.
Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure.
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Removable Oxygen Generator
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