Fin nipping is most commonly caused from stress. I would guess it is his tank mates or bad water condition? What are the ammonia, nitrate, nitrite, levels etc? What is his water temp? What do you feed him? What tank size? You need a bare min of a 3 gallon for tank mates. I would suspect its the guppies nipping him, and not him nipping himself. You may not see it happen, but guppies can nip.
If he is in a 1 gallon (only for old Betta's who can't find food properly in a 2.5-10g or for betta fry) he can't have tank mates at all.
OK. But I'm telling you that's the issue. It's the guppies are nipping his long flowing fins. He to slow to defend himself. And his introverted behavior is indicative of that. You asked for help, and 2 ppl have given you insight on the problem. If you have a different theory than I wish you the best of luck validating it
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Really? You think the brand of fish food is causing your fish to chew on its own fins?
That's good that u notice the food is molding at the bottom but the molding food isnt the main problem. When that food sits there it creates ammonia. Your problem is your tank doesnt have enough beneficial bacteria to deal with that ammonia and turn it into nitrates. You need to go to the store and get some prime and a test kit. Please listen to the other people talking in here there just trying to help. Keeping fish is not just putting them in a bowl with water!
Awesome! Great to hear!
