In my tank polyops, nsnails, and coral wont live in my tank, they all die very quickly. However all fish and shrimp are living fine. My guy at my LFS
said he thought it was some type of metal in my water. We tested it for copper and found zero copper in the water...is there anything else it could be? My ammonia and nitrite are zero. My nitrate's are 5 and my ph
is 8.2 It's a 35 gallon hexagon tank with a powerquad 96 lighting system.