I would like to keep snails in my tanks. Right now I have a few ramshorn snails in my 30 gallon tank which seem to be doing ok. But the olive nerita snails in my 10 gallon aren't doing too good at the moment. They have shell erosion I'm going to try and give them calcium supplements but not sure if they will eat it or not. I was just wondering what the ph requirements snails need. The ph in my tanks are usually 7.0. Is that to low for snails? What snails do well in a ph of 7.0?