I think I may have a white, fuzzy mold growing on the heater in my betta tank. This is the second time I have noticed it happening. The first time I just took the heater out of the tank and scrubbed it off.
Any ideas why this is happening and how I can prevent it. I do not noticed it in the gravel, on the plants or the castle that I have in the tank. It is only occurring on the heater.
My water quality seems good. I test it every few days. I think my tank is still cycling because I still get ammonia readings although the levels are going down. Because of this, I try to do a 50% water change every other day.
Anything else I can do to keep my tank healthy for my betta?