There is some useful information about getting rid of small snails on
AquariumFish.net at

http://www.aquariumfish.net/informat...all_snails.htm

There is a discussion about the same problem on PetFishTalk.com at

http://media1.select.net/wsradioarch...ium1080702.wma

I hope this information helps you.

FishFred