Hi, one badis in my tank has been having a rough two weeks. Isolated, dark in color, not eating well. I've done some isolation and various medications as well as solitary live brine shrimp feedings. Now he seems to be having involuntary body curling and tipping over, not able to freely swim and use ventral fins, and doing some odd diving at the substrate in the curved position. Still quite alive but definitely time for euthanasia. I'm wondering if this is a sign of a particular disease, genetic, or other? Tank is healthy and planted with great water conditions and stable temp. This badis has only been in the tank about 3 months and the other one is happy. Thanks!