First, fish farming must first raise water.
If the water quality is not good, too many toxic substances will affect the growth of fish. If there is too much sediment in the pool, the sediment should be taken out of the pool and exposed to the sun for a period of time to disinfect the bottom of the pool.
Second, the matters needing attention of algae
Algae are very important for the reproduction of grass carp. Usually light green pool water and oily green water will produce more algae, and other abnormal colors will kill algae.
Third, the feeding precautions
1. Feeding fresh feed is rich in nutrition and low in cellulose, which is easy to be digested and absorbed by grass carp. If the feed is not fresh because of aging, there is more cellulose in it, so grass carp will not be easy to digest after eating it. At the same time, the feeding of aquatic plants is reduced. The coefficient of grass carp feeding high-quality terrestrial green feed is11-kloc-0/5, and the coefficient of grass carp feeding aquatic plants is 60-80.
2. Feed more fresh and tender feed: Fresh and tender feed is rich in nutrition, less in cellulose and easy to digest. Feeding grass carp with fresh and tender forage grass can make grass carp grow faster, have fewer diseases, reduce feeding amount, reduce breeding cost and improve economic benefits.
3. The feeding method should be proper: feed grass carp regularly, adequately and evenly every day, so as to spread the forage and let the fish eat well. Adjust the feeding amount according to the weather, water quality, fish activities and other specific conditions. It is forbidden to feed forage that has been stored for too long and is moldy and deteriorated to prevent grass carp from getting sick.
4. Feeding according to the diameter of the fish: the diameter of grass carp larvae is small, so it is impossible to feed coarse and hard forage. It is advisable to feed duckweed, sedge and other forage, or feed fresh and tender long-leaved grass after barium crushing. After that, with the growth of fish age, the caliber gradually increases, and it can be fed with conventional fresh feed.
Fourth, the quality and disinfection of forage grass
Julia tender grass with parallel veins should be used as forage grass, and netted grass with anorexia of grass carp should not be used as forage grass. It is best to feed the planted ryegrass, Sudan grass and other grasses and the collected wild long-leaved tender grass. Usually, we should also observe the grazing situation of grass carp. Grass carp should feed more grass they like to meet the needs of grass carp growth and development, and should not be anorexic or feed grass carp as little as possible.