Treatment of fishy smell of farmed eel

The fishy smell of eel is similar to that of other freshwater fish. the cause is mainly due to the release of chemicals produced by algae such as tremor, Anabaena and actinomycetes in bacteria in the process of growth and reproduction and infiltrate into the muscle of eel, resulting in a special fishy smell of eel.

Raising eel in soil pond, using algae to maintain the ecological environment of pond water, consuming organic matter and some chemicals harmful to eel, and reducing the amount of water exchange, which is conducive to the normal growth of eel. However, in the environment of suitable water temperature and rich content of organic matter, algae will multiply and grow rapidly and produce a large number of chemical substances. The sludge at the bottom of the pond, a large number of fecal secretions produced by eels and the lost residual bait provide good nutritional conditions for the reproduction and growth of algae. In the season with high water temperature, algae multiply in large numbers, and it is difficult to control the stability of algae even if the amount of water exchange is increased. There are conditions suitable for the growth and reproduction of algae and actinomycetes in soil ponds and large area intensive ponds. The chemicals produced by algae and other chemicals that cause the fishy smell of eel have been kept at a certain concentration in the culture water for a long time, and the eel produced is easy to produce fishy smell, especially in the high temperature period from July to October.

How to effectively prevent eel from fishy smell in aquaculture production? It is the key to control the bottom sediment, reduce the content of silt at the bottom and reduce the source of organic matter in the process of culture. At the end of a culture cycle, dry ponds should be exposed to the bottom of the pond, and the bottom silt should be cleaned out of the pond. In the process of culture, we should control the content of organic matter in the water body, select water sources with less organic matter, increase the amount of water exchange, regularly use water quality improvers such as quicklime, zeolite powder, ion exchange and complexing agents, oxidants, etc., and use microecological agents, it is unique in stabilizing algae phase, cultivating water color, inhibiting the growth and reproduction of actinomycetes, tremor algae and Anabaena. It can also make use of the strong selective ion exchange ability of its molecular active groups to regulate and improve the substrate. Regular use of microecological agents can not only avoid a lot of trouble and inconvenience, such as disinfection due to a large number of water changes, fish consumption decline, economic and fast, can fundamentally eliminate the production of fishy smell.

The eel with earthy smell can remove the fishy smell after being hoisted with clean water, and the dual effects of improving meat quality and eliminating fishy smell can be achieved by using seaweed essence. In short, the regular use of microecological agents to control water quality and the addition of seaweed essence to feed can effectively prevent the occurrence of fishy smell.