Get a small loach to help control population if you plan on keeping thiem. They may already be in your filter, so removing them may prove pointless. They are the rabbits of the underwater world. I have a Speckled Loach that controlled my TONS AND TONS of snails. So well, that as far as I can tell, he's had them wiped out for 3+ months. Now the hubby wants to keep a snail tank to have them on hand for the loach as "treats"... *sigh*