| Are you using tap water or ro/di?? One possibility is copper in your tank either from the water you're adding or from another source. I have had salinity fluctuations and never had a problem with the snails although the swings were not big but in any case I didn't notice a problem HTH
__________________ Robert
My Cube
“A spirit is manifest in the laws of the Universe—a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble.” Albert Einstein |