Hello everyone and thank you for taking the time to read this post.
My name's Karsten and I am posting on behalf of my girlfriend's betta, Fish. He's very ill. Here's the copy/paste.
What size is your tank? 3.5gal
What temperature is your tank? Room temp ~72-80F
Does your tank have a filter? Yes (We're not using it now.)
Does your tank have an air stone or other type of aeration? No
Is your tank heated? No
What tank mates does your betta fish live with? Bachelor pad
What type of food do you feed your betta fish? Hikari Betta Bio-Gold
How often do you feed your betta fish? Once per day
How often do you perform a water change? 3.5gal tank, twice weekly 33% but used to be in .5 gal tank with once weekly 100% changes. Let me apologize now, we were both irresponsible betta owners.
What type of additives do you add to the water when you perform a water change? Water conditioner
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your betta fish's appearance changed? Fish's dorsal fin has rotted off, seemingly revealing two dorsal fin bones. White fuzzy material seems to be infecting this area. Additionally white patches seem to be eating away at the tips of some of his other fins and even eating a hole in the middle of the fin. One patch we are particularly worried about is at the base of his butt and seems to be threatening to remove his rear fin and strike at the body.
How has your betta fish's behavior changed? His behavior hasn't changed much. He's a really fiesty fish and still energetic and vigorous, regardless of his lack of a dorsal fin. He eats voraciously and completes all his meals. I've been feeding him a little extra, trying to supply him with some extra building materials to rebuild his fins and fight the microbes.
When did you start noticing the symptoms? The tail patches seem to have been there for quite some time, not sure if he had them when we got him from the pet store. Dorsal fin detached three weeks ago, girlfriend tells me.
Have you started treating your fish? If so, how? After noticing his issues, I began flexing google muscles. We upgraded his tank. Then we started using bettafix. Naturally, this was at the suggestion of the pet store employee, who I doubt truly cared. We used bettafix for about two weeks with no noticeable change. I was worried that he was getting worse, so we picked up some E. erythomyocin by API. Unprepared, again, I find now that this medicine is not effective for gram-negative fin rot. We've done the initial two doses of erythromycin.
Does your fish have any history of being ill? Uh, possibly. We've let whatever he has now go on too long.
How old is your fish (approximately)? Fish just celebrated his third birthday on the 31st of July.
I'm attaching some pictures that will hopefully illustrate what's going on here. I'm finished blindly buying medicines to try and help poor fish and will turn this diagnosis over the the experts. Please help us! We're both committed to giving him a healthy, comfortable life.