I originally had a bladder snail. This snail did a great 'clean up job', kept algae growth on the tank sides at a minimum and was generally a great addition to the tank. Unfortunately I had to remove the snail from the tank due to its ability to reproduce rapidly by itself. Are there any species of freshwater snails that require other snails to mate and could be kept individually to prevent reproduction? (I would ideally like to get a reasonably small species due to the limited seize of the tank) (other tank mates: Glowlight tetras and Julli Corys).