In spring, the water temperature is low, and nutrients (nitrogen, phosphorus, potassium, etc. ), the number of beneficial algae in the water is small, which makes it difficult to fertilize the water in spring. Some ponds are even thin in water color and covered with green moss at the bottom. In view of the special climate and water environment in spring, the following scheme has been worked out by Zhengyang Company after test verification:
1, the water in the pond is thin, it is the first time to enter the pond, and no fertilization measures are used. Fertilizer treasure+fertilizer is used quickly. According to the maximum dosage, it can be used in sunny days without water. The effect is obvious, and it will be effective in two days.
2. The pond water is thin and turbid, and it is the first time to enter the water. Ponds without any fertilizer and water measures: First, use underwater double improvement, 8 mu/bag, to adjust the water quality, and then the same as above.
3. Ponds with thin water color, high transparency and moss: 2 kg to 3 kg of blue alum per mu of fish pond, and 20 kg of water sprayed between ponds. Generally, moss can be eliminated in 5 days. However, the dosage of blue alum should not be too much, so as not to kill fish and cause unnecessary losses.