I have a 1gal tank dedicated to raising snails (turtle snacks) and recently noticed tiny white worms. After a bit of panicking and researching, discovered that they are most likely planaria. Figure there's a good chance that over-feeding is to blame as I usually put a bit of algae wafer or chunk of cucumber in there for them once or twice a week. But, since it is a snail tank, can't go with the usual feeding guidelines like with fish (at least my snails don't come up to get fed). Any recommendations on how I can get rid of the little planaria and hopefully keep them from coming back?