After the ice-breaking oxygenated water surface is frozen, it is necessary to open the ice surface every morning and evening. Generally, 5 to 6 square meters of ice eyes should be opened per acre of fish ponds, and at the same time, the mashed ice cubes should be removed. , so as not to quickly freeze again.
In addition to the new water fish during the winter season in addition to maintaining the highest level of oxygen, warm water, but also should be regularly injected new water, improve the fish living environment, increase dissolved oxygen, water injection is generally once every 20 days. If the water quality of the pond is poor and there is an aging phenomenon, the old water and harmful substances in the pool should be promptly discharged. The amount of water changed every time is 1/3 of the original pond water, and then the new water is injected in time.
Appropriate fertilization When the water in the ponds is lean, certain inorganic fertilizers can be applied at noon on sunny days to promote the growth and warmth of the phytoplankton in the water. It is also possible to increase the dissolved oxygen in the water through photosynthesis. The fertilizer is mixed with nitrogen and phosphorus. Apply.
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