My pH is in that range. I haven’t noticed that spot get better. Should I worry about that or do something for it? However I was originally referring to the strange poo and fuzzy like stuff on him. It’s only in that one spot and it appears like it’s comes off in the water in tiny little particles. Thanks for your help!Dch48 said:If you mean the white spot on his shell, it could be caused by too low of a pH in the water. Snails like 7.5 to 7.8, or even up to 8.0.