Rod-like fins on Betta Hi Robert, <Nelly... my mother's name...> I have a sick Betta with rod-like fins and tail. (As far, this is the best site I found). <Yikes... sounds very much like "Anchor Worm"... a copepod parasite... please see the pix here: Yucky Anchor Worm>  About ten months ago I got 3 male Bettas: blue, turquoise and purple. The blue one (the most beautiful) died soon after I got them. The fins and tail looked rod-like. When I showed the sick fish to the man in the pet store from where the Betta came, he told me that he never seen such a disease.  However he suggested trying BettaFix which I did with no results. <Mmm, no... a sort of anti-microbial... not useful against metazoans... you want an organophosphate (yes, like the insecticides)> Then after a few months the purple Betta was in the same condition. I had Melafix by that time and after only one treatment she was fine. Miraculously the fins had opened again like a mantel. At that time I was not aware that BettaFix and Melafix are the same thing (Melaleuca-or tea tree oil) only in different concentration, so you need more drops from the weaker solution. <Yes... both Aquarium Pharmaceutical's products> Now the turquoise Betta is sick for about 2 weeks with the same symptoms.  None of the BettaFix has helped him. He eats does not get better. He does not move very much around and his color is fading. I do not think this is fin rot because the fins are there [and] he just [can't] open them. I keep each Betta in one-gallon cylindrical glass container, use Aquarium salt, Stress Coat Water Conditioner and change the water frequently, so never gets polluted. The temperature is in the high 70s Fahrenheit. There are not small heaters on the market to be used for 1-gallon container, but I have underneath a heating pad that provides the right temperature. <Good> The water test shows ideal for pH, Chlorine, Ammonia, Nitrates and Nitrites. To reduce the amount of the stress I also have a piece of cardboard between the glass vases so they fight only when I remove the cardboard. I think that in nature they fight, but only if there is an intruder (which can not be all the time).  <Good move> Is it possible to identify the disease by looking at the photo in the attachment? <Mmm, the attachment would not load through Hotmail... Argggghhhh... Would you kindly try re-sending it to here, the WWM mail server?> I have showed the picture with the sick Betta to people in several fish stores around and nobody knows about it. What should I do to save this courageous boy? <Treat with Dimilin, DTHP/Masoten/Dylox/Neguvon... these active ingredients... IS sold for pet-fish use by several names...> Thank you so much for you comprehensive site. Nelly <Getting better by bits and pieces. Bob Fenner>