With the gradual increase of temperature, the algae in the pond gradually become active. Toxic substances (ammonia nitrogen, nitrites, hydrogen sulfide, etc.) produced by excessive rot of macroalgae can cause great harm to fish farming. How to effectively control the growth of moss and even remove the moss becomes a problem to be solved in pond culture. Let's talk about the advantages and disadvantages of several common methods.
1. Chemical drug method: The use of copper sulfate and other chemical agents to kill the moss is more dangerous, especially in the high temperature season copper sulfate toxicity has a great impact on fish. Although chemical methods are effective, they have the greatest toxic and side effects.
2. Physical shading method: According to the characteristics of moss and light, we can use plant ash and wheat bran to control shading. However, since the ash of plants is easily affected by the wind and does not precipitate after absorbing water, the use effect is not ideal, so wheat bran is often used. The physical method is characterized by not splashing in the whole pool and being easy to use, but the wheat bran will also increase the oxygen consumption of the pond after it is corrupted.
3. Ecological control law: A sufficient amount of white peony can effectively control the growth of moss, or regular use of denitrifying bacteria, Bacillus and other beneficial microecological preparations also have good results. The use of ecological methods is slow and depends mainly on prevention, but the effect is stable and has no effect on the growth of fish.
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