First, a reasonable mix of filter-eating fish, with about 30% of the white peony, not only can effectively reduce the water's fatness, but also improve the pond's yield. Second, timely injection of new water in June-September, every 5-7 days a new water, each 10-20 cm. The addition of new water not only brings in more dissolved oxygen, but also brings about some nutrients lacking in the pool, which is beneficial to the growth of phytoplankton. Third, regular sprinkling of lime in the main growing season of fish, spill lime once every half a month. Depth of 1 meter per mu with lime 15-20 kg, after the slurry Quanchiposa. Not only maintain water quality "fat, live, tender and cool", but also prevent fish diseases. Fourth, rational use of aerators use aerator to correctly grasp the boot time. The boot time should be taken at noon on sunny days, open in the early morning on cloudy days, and open in the middle of the night on cloudy days; in the main growing season of fish, it should be open every day at sunny noon. The operating time can take the long boot time at midnight, and the principle of short boot at noon. 5. Ingenious application of inorganic fertilizer When the algae in the pond are multiplying and forming blooms, it is easy to form "turning water" and it should be dealt with promptly. The method is to apply 5 kg of ammonium bicarbonate and superphosphate per acre in the morning on a sunny day. After the solution is dissolved, the whole pool will be sprayed evenly, which can effectively maintain the water bloom for a long time without “turning waterâ€. Sixth, adhere to the Xuntang, I would like to adhere to sudden changes in water quality, adhere to the morning, the middle and afternoon tour ponds, pay attention to observe changes in water quality. When the cyanobacteria in the pond are multiplying, a total of 0.7 g/m3 of copper sulfate and ferrous sulfate mixture (5:2) is splashed and killed, and then some of the pool water is replaced. When the pool water is changed from clear green water to clear fresh water, black, smelly, and the fish is not normal around the pool, it should immediately start the aerator, remove the bottom water on the one hand, and immediately add fresh water on the other Water accumulates fish in the water injection area until the fish activity is normal.
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