What is the correct way to change all the water in the fish tank? How much is the water change?

If you want to change all the water in the fish tank, you need to fish out the fish in the tank first, put them in other places temporarily, and then clean out other equipment to empty the fish tank. After it is empty, the algae on the wall of the jar needs to be scraped off with an algae scraper, and potassium permanganate can also be used for disinfection. After disinfection, it is necessary to inject new water and re-raise the water before releasing the fish. It should be noted that fish tanks usually do not change all the water, but only a quarter of it.

1. before

all the water is changed, all the fish in the tank should be fished out, other feeding containers should be prepared, and they should be put into them for a period of time. After that, all the water in the fish tank should be drained, and if there are other things in the tank, they should also be taken out, so that the whole fish tank is completely empty.

2. Clean the fish

tank. After the fish tank is completely empty, it can be cleaned. If there is too much algae on it, you can scrape it all off with a tool such as an algae scraper and clean it out. In addition to cleaning up algae, it is also necessary to disinfect the fish tank, usually with potassium permanganate, which is mixed into a solution and poured into the tank, soaking the inner wall for an hour, and then washed to avoid drug residues.

3. After the disinfection of the new water

is completed, the new water can be injected into the fish tank. The new water must use the tap water that has been used, otherwise there will be residual chlorine in the water, which is harmful to the health of fish. After the new water is injected, the filter needs to be opened and filtered for a period of time, so that the impurities in the water can be filtered out, and at the same time, the oxygen pump can be used to fill it with oxygen.

Although the new water has been treated, if you want to raise fish, you still need to cultivate nitrifying bacteria. To cultivate bacteria, you need to pour the culture solution into the tank or put it in the filter box. At the same time, turn off the light and explode the oxygen to accelerate its growth and reproduction. When the water is muddy and clear, you can release the fish.