My Betta has been lethargic, and generally uninterested in his surroundings, for a while. He mostly stays on the bottom of the tank, or in his tube caves. His appetite is good. His water conditions/quality are all within recommended ranges, and temperature and filtration are have been stable. When all other factors (disease, parasites, etc.) have been ruled out, I have considered adding a female Betta to his tank for companionship, not for breeding. Can they live peacefully together?
