I just noticed 5 small snails eating away at the little bit of algae on my glass. They probably hitched a ride in on one of my plants which I did not treat in alum. I've read that these snails are very great at breading. Should I be alarmed about my plants possibly becomming a food source or will they continue to feed on algae and other detritus in the tank? I don't own any clown loaches or other snail eaters since the tank is only a 29 gallon. Pretty much this tank is a moderately high light tank with CO2 injection and has about 65% of the substrate covered in plants.