Snails are no problem. Actually, I have a snail problem
You know how you buy an aquatic plant at the petstore, and you see one lone snail on it once you get it home, and you're like, "Aww! How cute! I'm going to keep him!" And the next thing you know you have a tank full of the buggers :P
Thanks for the links Spoot! I'll check those out.
And thanks for the fast replies!