So my female Betta (from my local PetSmart where they actually *gasp* take care of their fish) has been doing fine, eating and swimming around. She's slowly recovering from fin rot, but I noticed today that the top of her body is almost completely black. It almost looks like her scales are falling off. She has a slight abrasions from getting caught in a bad net that seems to be healing fine, but the black patch has only grown. It was there before her abrasion. She's not showing any signs of lethargy or refusal to eat. I'm purchasing a water test kit, but my other Betta is having no problems in the same tank. Any ideas? I've only had her since March.