can be released in a few days after the

old fish tank is completely replaced with new water. Fish can be released in about three days after the old fish tank is completely replaced with new water. The situation of changing water in the whole tank is rare, because the amount of water changed is too large, which will cause some stimulation to the fish, usually up to one third. But if a large number of dead fish in the tank, or the water grass mud pulverization is serious, the water quality can not be maintained at all, it is necessary to replace all the new water. It should be noted that the new water should not only be dried, but also be filtered and oxygenated.

2. When do you need to change the water

in the whole tank? 1. A large number of fish died: The fish in the tank died suddenly. One death may be accidental, but a large number of deaths indicate that there is a big problem with the water in the tank, and the water in the whole tank must be changed. In addition to changing the water, it is also necessary to turn over the tank, that is, to re-open the tank, through disinfection of the water, before the fish can be put back into it.

2. Aquatic grass mud pulverization: The change of water in the whole fish tank is due to the death of fish, while the change of water in the grass tank is due to the pulverization of aquatic grass mud. This kind of mud is used for planting aquatic plants, which will slowly pulverize after a long time. At this time, it can not fix the aquatic plants, but also make the water turbid, so it is necessary to turn over the tank and change the mud, and naturally change the water.

3. Change the landscaping: If you are not satisfied with the landscaping in the jar and want to rearrange it, you also need to change all the water in the jar, take out the things inside, such as stones, sunken wood, etc., disinfect and clean them, then put them in again, and then inject new water.