Help! Betta sick!

[Jezah]

I just did fin-rot surgery on my beloved betta boy cause his fin rot was nearly to his body and wasnt getting better with meds. I did it exactly as it says on Bettatalk...but now he is in the tank and cant seem to get to the bottom. He keeps trying, but then floats right back up to the top. I used hydrogen Peroxide...and now his fins seem like they are holding on to tiny air bubbles. Read here how I did the surgery. Help! I am considering right now just lopping off the ends of his fins to get rid of the infected part. Would this kill/seriously injure him? EEEE!

 

[Bloo]

You might find better luck over in the betta secion. However I can tell you that years ago (10 or 15 years) when I kept fancy goldfish with long fins and encountered finrot, I used the cutting fin & mercurochrome (2% solution) method. It worked fantastically well. But do be careful *not* to cut too far or else you'll cause a lot more damage than potential help.
Not sure if you can get mercurochrome solution in the USA, but you can't in the UK. In South Africa though it's something you can buy in any chemist on the shelf.
I used sterilized very sharp medical scissors. Cut off just enough if the infected part of the fin, and then dropped a few drops of the 2% solution on the tail. Kept it in the net for a further 10 seconds to make sure the mercurochrome solution "took" to the offended area and then put the fish back in the tank. I repeated the drop / net treatment for a few days until it looked like it started to heal.

That always worked for me.
I've not had a finrot outbreak for years now and believe it has a large part to do with the quality of water you keep your fish in.