Hi, Thanks for your reply.. It's the only one I've had so far. I kinda thought major fin rot. I think time is running out for him. I put him in betta revive last night but he seems worse. He hasn't eaten in 2 days & just floating on top. His gills look like they are open which I've never seen before
. answers to your questions are I've had him almost 2 yrs, he lives alone in a 2 1/2 gal tank. I normally change his H20 100% every week or so and that seemed to work out fine. I treat the H2O with 1/4 tsp aquarium salt along with Kordon AmQuel + and NovAqua +. He's never really been sick, just not very active fish compared to my other betta which I do the same routine with and he's totally fine. The tanks are not heated temps are usually around 74 degrees,no filter,no aeration. he eats Hikari Betta Bio-Gold pellets usually 2 in AM and 2 in PM. I've never tested the H2O before because there was never a problem. All my previous bettas I did the exact same thing with and they were always happy, healthy and lived pretty long. I'm just at a loss as to what Smokie has and how to treat it?!