Ok, so i got some ramshorn snails the other day, and they all appear to be dead. I checked everything twice and all levels were normal. Just to try i went and got a copper test kit today and checked all my tanks. The tanks don't register any copper but my tap water which i use to top off does. Are the liquid ciooer tests just not sensitive enough to detect an amount of copper that would still kill a snail? So i'm guessing since copper is extremely difficult to remove that it must be in the tanks. I have some cuprisorb running in one tank, but i don't know if that will remove anything. It sucks cause i wanted to keep some snails for the DPs that i am getting in a week. I guess worse comes to worse i'll buy a small tanks and use RO water. Ok, next question. Are shrimp just as sensitive to copper as snails? I would like to have some shrimp in my tank, but i don't want to add them knowing they prob. won't make it.