If you want to remove alkali thoroughly in the cement pool, you can use the acid-base neutralization method to pour some acidic substances into it, and then you can wash it several times to prevent acidic residues.The reason why we need to remove alkali is that cement contains cement alkali, which can reduce the dissolved oxygen in the water body, and also precipitate a large amount of calcium carbonate, which is very harmful to the health of fish.
1. Natural removal of alkali: The method of natural removal of alkali is the slowest to take effect. It is definitely not suitable for people who are eager to raise fish. However, this method is also the safest and will not have any side effects.Fill the cement tank with water and change it every 2-3 days. It usually takes 15-20 days to remove the high alkaline substances. When there is moss on the wall of the cement tank, it is successful.
2. Vinegar soaking: Vinegar is acidic, so it can play a role in removing alkali.First, fill the pool with water, and then add a proper amount of vinegar, usually 0.5 kg of vinegar per cubic meter of water, soak 1-2 days to drain, clean and inject new water.In addition to vinegar, you can also choose ice vinegar, not only can soak, but also directly wash the pool wall.
3. Alum neutralization: The principle of alum neutralization is the same as above. After filling the pool with clear water, slowly add alum until it is no longer dissolved.Draining off water after soaking for 1-2 days, and cleaning.
4. Calcium superphosphate: Pouring an appropriate amount of calcium superphosphate into the pool water can also have the effect of removing alkali. 1000 grams should be added to each cubic meter of water. It also needs to be soaked for several days before draining.
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