Well I think I found out the problem, you guys were right about the decor I had a plant plate in there that my frogs ate from, and since that is were the snails seem to die near, I took it out. This morning I noticed both snails are alive and eating. So here is hoping. I love snails and really want them in this tank. If this doesn't work then I have no clue. No meds, or copper in this tank. It is not used, and snails have come from differen't sources. I don't think that fish are bothering them, I don't see any aggression or curiosity to the snails. So far I have lost 4 apple snails, and a tiger snail, not to mention all of my pond snails. Here is hoping it was that dish!! I will keep you posted.