Well Known Member
- Reaction score
My brother has a 20 gallon axolotl tank, and for some reason, the water is always murky. We've tested the water and everything's fine, and our other 2 tanks do not have this issue. It stays murky even after water changes. I suspect that the black sand substrate might have something to do with it since that's the only thing different about it compared to the other tanks. How do I clear up the water?