- Reaction score
- 1 year
it apeers to be brown algea.Ioana Dog said:
I took it to cycle another tank. All my tanks have an aquaclear and double sided sponge. How often should they be replaced anyway? Every now and then a rinse it in old tank water but haven’t actually thrown any out.AquaticJ said:It's just brown algae, harmless and common. Also, is there a reason you replaced the sponge?