I just bought 1 snail tonight. I do not know much about them, this one was a larger snail and since I only bought 1 it cannot reproduce. Are any type of snails good for a community of fish?
Yep. Mystery snail (Pomacea diffusa). They don't eat plants and can get along with some fish. Some fish though will nip their antennaes and eye stalks.
I bought 2 of these on Saturday, one gold one blue, for the first couple of days they wandered all over the tank. No sign of them anywhere yesterday or today- was begining to think my Neons had managed to smuggle a Dremel in and cut them up but I just found them snuggled up together in my Pictus' hollow log. The Pictus doesn't seem to keen on sharing but doesn't look like he has much choice!