What kind of filter can keep fish tank from changing water for a long time?
First suggested by the side filter, plug barrel, select a bottom filter as the main digestive bacteria culture bed, increase the amount of ceramic ring inside, can put a lot of as far as possible, with one to three layers of filter sponge in the ring, in the water by adding digesting bacteria used to decompose ammonia and other harmful chemicals, a week can be successfully cultured in digestive system,
Any filter system can make your digestive system does not change the water tank for a long period of time, it does not change the water ammonia nitrogen nitrite can not be reduced, the fish will be a problem for you, recommend you use plug-in tube to filter, biochemical ring put some questions:
A fish tank was made 3 times ago. The water was changed twice in two months. Do you have the cylinder diagram?:
usually water once a week, adding the bacteria once, so your tank is very good, not even the disease don't put medicine water stabilizer without changing water tank, that is a lie