2. Feeding: If you simply feed the fish, the cost is relatively high, so before stocking the fry, you can apply fertilizer, and use some decomposed and fermented livestock manure to enrich the water quality. Some small creatures will breed in the water and provide underwater feed for the fish. Sometimes you can feed fish with the meat of snails and mussels. Generally, the fish should be fed no more than twice a day, and the feeding amount is generally until the fish do not eat, so that the fish can grow rapidly.
3. Summer: water quality dominated by biological fertilizers in summer. At this time, more fertilizer can be applied. The color of water is preferably dark brown, but it still needs 30 cm of visible transparency. You can't see anything. About 200 kilograms of fertilizer is needed per mu, and it is used as required. It is necessary to reinforce ponds and some protective facilities, such as blocking nets, to prevent summer floods from entering the damaged facilities. At this time, it is the fastest growing period, so it is necessary to increase feed, pay attention to the proportion of feed nutrition, and put more feed containing more protein.
4. Winter: mainly to control the temperature. When the water temperature is not lower than 15 degrees, the fish will not grow and start to hibernate. Therefore, it is necessary to provide artificial insulation, generally adding water, and the temperature below the water depth can be maintained. It is best to cultivate in a greenhouse, which can create a warm environment. The water temperature has risen a lot. At this time, we should pay attention to less fertilization, slow decomposition and more planting. Algae can prevent fish from lack of oxygen. Feed should be kept normal to keep warm and keep weight.