First, check vision. Can he see? Bad conditions can affect sight. If that's a yes, there are threads out there for blind bettas. If vision is good, try different foods. My little man gulps up Omega One Betta Bufet Pellets, but your guy might be a flake man. Or you might just have to go with treat-ish stuff like freeze-dried bloodworms or fresh foods until you can get him on a proper diet. Getting him to eat is #1. Then you can worry about nutrition.
I almost forgot to ask, what kind of tank do you have him in? Filter? Heater and temp? Have you put in a carbon filter to get rid of all those Ick meds yet?
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Last edited by Bluewind; 01-06-2013 at 02:27 PM.