Well I think the lack of KH and now acidic water may have killed off my ramshorns. They don"t have any of that fuzzy mold around them like I would expect, but they haven't moved in a while... Aside from that, I dunno.
I do have a 10 gallon that is cycling, ammonia has zeroed out but nitrites are very high. Though, from my understanding, they have lungs and nitrites only affect oxygen absorption in gill-equipped critters. Safe?