Overwintering pools of fish often cause a large number of fish deaths due to lack of oxygen. The methods for increasing oxygen in fish overwintering pools are:
1. Fill water with oxygen. During the winter, when there is a lack of water and oxygen in the fish ponds, water can be diverted directly into the pond. However, water containing too much iron can not be directly injected into fish ponds. It must be oxidized and precipitated for a certain period of time before it can be injected into the pond. The time of water injection and the amount of water injection should be shortened as much as possible. Ice water is generally about 2 meters.
2. Inflate oxygen. Use a windmill or other power to drive the air pump to set the air pressure in the hose under the ice water. Attach a sand filter to the top of the glue track or directly pierce the holes in the hose to allow the air to diffuse into the water with tiny air bubbles. Pure oxygen can also be directly sent to the reservoir through the hose, allowing oxygen to gradually diffuse into the water for oxygen supplements.
3. Chemical oxygenation. When oxygen deficiency occurs in small water bodies such as wintering in greenhouses and overwintering in refrigerators, chemical aids may be added to first aid. Currently used chemical oxygenation agents are: calcium peroxide and hydrogen peroxide, etc., with an amount of 10 mg/L, ie, 10-20 ml per cubic meter of water, which can play a role in aerating 1-2 mg/L. , but not too much, so as not to cause harm to fish.
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