God I know what you guys are going through! My last Betta lived in a fish bowl for 5 years with no heater, no filter, a few live plants and bi-weekly water changes... no problems. The new one with the perfect tank and perfect water conditions and heater and filter and Summer House in the Hamptons has fin rot!
I think it may be because he insists on sleeping up against the filter which drags his fins through and probably rips them (he's a lovable little freak) but I dunno ... he may have had a fungal infection when I got him.
Anyway just wanted to see if anyone had had any luck with MelaFix and aquarium salt. I took a water sample down to the aquarium today and this is what they suggested. That and daily 25% water changes until it clears up. I'm worried though cos now I keep reading all over the internet how bad MelaFix is for bettas...
On the bright side however within two hours of putting in the MelaFix and salt and upping the temp to 28 degrees C he is no longer scratching and darting about and the tiny white patch on his head (which he came with hence me thinking complimentary fungal infection) has all but dissapeared.
Advise? Thoughts? Feelings?