Join Date: Aug 2006
Location: Lupin Information Super Highway/Goldfish Information Super Highway
Nerites are extremely picky with their foods. They prefer constant supply of algae above anything else. Can you manage to culture algae? It's easily done if you have constant source of sunlight. By the way, as with all snails, your water must be hard and alkaline as soft acidic water can cause shell pitting, detrimental to snails' health.
Once shell pitting occurs on the nerite snails, there's no way the damage will repair itself.