I have fish! Three guppy tanks, and my mom is starting out with saltwater. Unfortunately I'm having a sudden wave of deaths after buying some new fish at the fish store, and I can't figure out what's going on! They don't have ich, but their eyes get cloudy and they start acting like their blind. Fins deteriorate and their gills look red. They die within 2 to 3 days. Losing a lot of fish right now and desperately doing water changes while trying to figure out what's wrong.