How to disinfect fish ponds with bleaching powder

The main component in bleaching water is sodium hypochlorite. The bleach that needs attention here is not an aqueous solution of bleach. Although there is only a word difference between them, they are completely different substances. The main component of bleaching water is sodium salt, while the main component of bleaching powder is calcium salt. As an aquatic product person, this must be made clear first, so as not to make people laugh.

Let's look at the formation of bleaching water. Bleaching water is the product of chemical reaction between chlorine and sodium hydroxide solution. Sodium hypochlorite can react with water and carbon dioxide to produce hypochlorous acid (with strong oxidation), so it is used as a disinfectant for water bodies according to this characteristic (this seems to be rarely used in large-scale aquaculture, but it is widely used in ornamental fish industry because of its convenience and effectiveness); In addition, bleaching powder can also reduce colored substances and play a role in bleaching (this is used more in chemical and textile industries), so it is called bleaching water.

1, disinfection with water: this is only applicable to water bodies, and is generally used in cement ponds, etc. If it is a large water body, the dosage is large and it is inconvenient to use (it must be uniform). In the absence of fish, the amount of water used for disinfection in fish ponds should be at least 40 grams (milliliters) per square meter, that is, taking the water depth 1 meter as an example, it needs to be used once per mu of water surface.

2. Disinfection of dry pond: this is inconvenient to use, but it has a good effect on the surface of fish ponds, especially in cement ponds, where there is no sediment. The method is to add water in the bleaching water according to the ratio of 1: 10, and then spray it on the surface of the pond for disinfection, but this has the disadvantage that it is difficult to kill deep-seated bacteria if there is mud in the pond.

3. Precautions: When using bleach for disinfection, it is best to avoid the period with strong light at noon on sunny days, otherwise it will volatilize quickly, which will do great harm to the pesticide users, and at the same time, it will affect the concentration and use effect of the drug because of its rapid volatilization; In addition, avoid splashing drugs on clothes when using, otherwise clothes will be bleached.