I recently purchased some Pictus cats about a week ago, and when I looked in my tank this morning two of the fish were dead. Later that same day I noticed another fish died, and less than 24 hours later my last fish had died. I immediately did a test on my water and my readings were fine. The pH level was at 7.2, ammonia level 0 ppm, and the nitrites were at 0. The one thing I noticed was that only one of the four fish would eat vigorously. The other three fish would just swim at the bottom like they weren't hungry. I never really saw them eat. I would rotate feeding them different foods such as: tropical fish flakes, freeze dried blood worms, and sinking shrimp pellets. Did I do something wrong, or did I just have a bad bunch of fish? I did cycle my tank if that helps.