My 20 gallon RCS tank is being taken over by snails!! I believe they are bladder snails? They are golden/transparent and the largest ones are about 1/4" long. I can pull 100 or so every couple of days and they just keep coming back! Is there a fish or something that I can introduce to control them that won't decimate my cherries? Would a loach prefer the snails or shrimp? Or is there another option? I've got some assassin snails but I've heard that they prefer eating snails that are closer to their own size?