hey guys quick question. I have 125 gal tank that I set up early December 2016 and this is the second batch of astreas snails that die on me. My parameters are all on check. As for livestock I have two tangs, two clowns, some blue reef chromis, red legs, blue legs, 2 emeralds and cleaner shrimp. They all are doing good. Going crazy trying to figure out why they keep dying on me. Only thing I could think of that I havent tested for is copper, but wouldnt my other inverts be dying as well if that were the case? Might go get a cheap test kit to check that possibility. Like to get some input and thanks in advance!