The white floc in the fish tank is usually bacterial film, which is harmless to the fish and can be cleaned up. If not cleaned, it will disappear after a period of time. In addition to the bacterial film, this floc may also be protein worms. This is due to the serious eutrophication of the water body, which will cause them to multiply in large numbers. Although it is basically harmless to fish, it is best to clean it, pay attention to reducing feeding, and change the water regularly.

The reasons why there are white flocs in the fish tank

1. If the fish are fed food with too high protein content, it will be excreted from the body because it cannot be digested. Nutrients for protein worms in the water environment increase the number of protein worms.

2. Because fish shed white floc after suffering from saprolegnia, white threads or floc appear in the fish tank.

3. Objects placed in the water, such as shells, stones, etc., if not cleaned for a long time, will produce bacterial film, causing white floc to appear in the fish tank.