How often do brocade carps change water, three common diseases and symptoms of koi in autumn

The water temperature in autumn is: one week after the water temperature stabilized at 25 ℃, to the week after the water temperature dropped to 18 ℃, at this time, our love carp food intake greatly increased, nutrition intake prepared for the winter, for this reason, we must: apply high-protein, high-fat and hyperchromic fish food, that is, green bud basic diet, accounting for 30% high-protein fish diet (crude protein composition ≥ 45%) 35% hyperchromic fish diet (spirulina ≥ 8%), 35% are fed three to four times a day, and the fish can be added once or twice more when they are old. The amount of food should be over 20 minutes for 3-year-old fish and 10 minutes for 2-year-old fish. Mixed with animal protein feed once a day, the best is the fresh and frozen silkworm pupa, the amount is controlled at 3 Mel 5 per fish. Shunde carp king carp farm has a selection of silkworm pupa supply. The bottom water of the Shen Dian warehouse, the first biochemical warehouse and the second biochemical warehouse in the filtration system should be removed once a day, and the bottom water of the clear water bin should be removed once a week.