yikes... i have to say i have no idea what that is. geez, it does look like it's coming off him somehow. i don't think that's what velvet looks like. maybe a bacterial infection? in absence of confirmation i would stick with the aq salt + 100% changes for a few days and see if it helps... you could maybe try pming one of the mods here if no one else sees your thread, sakura8 knows just about everything.
Hi chajewski and welcome to the forum. I'm sorry your guy is sick. It sounds like he may have a possible bacterial infection called columnaris; this is sometimes mistaken for a fungus because it's fuzzy and fungusy-like. Have you seen him do any darting or rubbing?
Now, you said he was a double halfmoon. In the pic, he looks like he is a short-tailed betta, a plakat? Is that correct, or has he had some really bad fin rot too?
For treatment, I would first lower the temp if you can to about 76 F. If this is columnaris, it thrives in the heat, which is why bettas get it so often. For conservative treatment, I'd suggest 1 tsp of aquarium salt per gallon and a 30-40% water change every three days, redosing the same amount of salt that you take out. So if you remove 3 gallons of water, add back in 3 tsps of salt. For best results, try to predissolve the salt in a little bit of tank water before adding.
I hope this helps and if not, we can try a more aggressive treatment. Keep us updated.
Hi everyone and thank you!! This is my first betta, and I am only going by what he was labeled as at the pet store. Before he got sick his fins seemed to be getting the half moon look that I saw in pictures, and as for male or female I didn't even think to double check. I will research some to see if I can find out.
Good news is that he didn't seem to get any worse over night, but he didn't improve either. I am going to lower the temp now and do a water change right after I eat. Also no I have not seem him dart around or rub against anything. Ever since yesterday's water change he mainly hangs out on his leaf bed and then swims around every so often.
I have another question though, is it possible that he does not like the really bright LED light. He seems a little more active when it is off, so I was curious.
Thank you again!!!
Hi chajewski, it's possible he doesn't like the bright light, yes. You can try to diffuse the light using floating plants; if you don't want to use live plants, just take a few plastic ones and float them.
Since he's not rubbing or darting, I'm going to rule out external parasites for now so go with the treatment I talked about earlier. Keep us updated.
Okay, I tried to block out the light which he seems to like, I am adding 2 new photos though, because now he seems to be getting raised fuzziness on his body. However even though he still looks horrible, he seems to be improving activity wise.
I did a 100% water change this morning just so I could re-start the aquarium salt, and will continue with the 30-40% now, the temp is also down to 77 right now, but it's getting cooler outside with the weather change by me so it should hit the target of 76. Also good news, I got him to eat a little bit of brine shrimp earlier also.
Again sorry about the picture quality. With the first picture I was trying to capture the fuzzy patch near the back of him. It looks pretty circular in the picture, the second picture is his other side with a couple different fuzzy spots. I know in the picture they look white, but that is just the lighting. Up close they are still a brownish color.