Recently I’ve been seeing tiny snails in my tank. I have no idea how many there are, or even if there is more than one or two but I finally managed to catch one. The only snails I have purposely put in my tank are nerite snails, but I don’t think this is a nerite because it comes pretty far out of it’s shell. It is very tiny and it’s shell is brown with a speckled pattern. Can anyone identify what type of snail it is? Also, what are the odds that I have a million in my tank?