I'm new but have had a cichlid tank for many years. I'm mostly a salt water aquarist. I've added a pic.of it. We quarantine our salt water fish before being introduced to a tank and if they get sick. So I've done the same with these. I did a water change and cleaned the gravel and Fluval external filter. It was about half of a 55 gallon tank. I have many cichlids in it. Some haps, mabunas, and the rest. Any idea what is wrong with it? I've tested the water and it tests good. I do my saltwater tanks once a week and do this one at the same time. It is just hanging out. It even let me hold it yesterday while cleaning the tank. The rest swim away very fast. Is there something I can add to her tea pot to help her? Prime or some antibacterial? Thanks and if you need any more info please don't hesitate to ask.
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