hey im new to planted tank but the best way i keep nails out is my clown loachs they do wonders...although depending on your tank size you should try to get a medium sized one also i have about 3 cory cats and whenever i see a snail at the top of the water line i take it out and crush it then drop it back in they go nuts over them and i see them sometimes even picking at the ones that are at the bottom
also you can also buy snails called assinan sails they eat other freshwater snails and dont reproduce that fast
thanks stephmkt. I'm afraid my current 3g is already over populated. I did have a clown loach, and he did almost iradicate the snails, then he got ich and died. I rather not do that again until I'm sure I can keep all conditons stable for the Clown Loach. Maybe an assassin snail, I'll look into that. thanks again.
Thanks rich, I'll try that. I think I may be over populated with fish and over feeding. 1 betta, 3 neon tetras, and a cory cat in a 3g. I think I may even get another nano, asap, and set that up to put some of them in there after it's cycled.