I've been trying to keep snails for a long time but I never really have much success with it... My tap water has parameter that is perfect for soft water fish. pH of 6.5 with no nitrate and very low gH and 0kH. As part of my fertilisation regime, I'm adding a little calcium carbonate to the tank to add calcium to the tank. I've never really measured my pH or any other parameter since then. What really annoys me is that I keep buying snails and they just die in my tank after 2-3 weeks. There is no sign of pitting or thinning of the shell. I've acclimatised them slowly to the water and I would like to think that my water doesn't contain any copper as my sakura shrimp seemed to be happy with the water quality. Anyone have similar experience?