I keep getting snails all over my tank. I think that some plants (Java Fern) I put in my tank a couple weeks ago must have had eggs on them or something. I have a Moonlight Gourami, Long Fin Danios, 2 swordtails and a couple of Pleco's in a 55gal with a UGF, Pengin 550 power head on one of the lift tubes and a 400 Emperor filter. What can I get that will take care of the snails and be alright with the fish I currently have?