I have so many snails in my Discus tank and was wondering if there is a fish that I can add to this tank that will eat them? The Discus have no interest in the the snails and they are starting to multiply big time. I've been searching for something that can tolerate the temp and leave the discus alone at the same time but so far nothing. Any suggestions? I was thinking of putting a couple YoYo Loaches in the tank?