Originally Posted by aokashi
I guess Aq salt and lowered temps for now :(
but it really should be treated asap...
Better off with super salt dips. Bettas can take a lot of salt and won't keel over like other fish do. Might try 1 tsp in a gallon. Put the fish in and stick around and watch. Can do 30 minute dips several times a day. You will find bettas can easily take double that. But again.. stay right there and watch them. If they show distress remove. Then put back in clean fresh water. Oxolinic acid in food is good for columnaris.
Peroxide will take it out too but care must be used as you CAN kill the fish. I keep mine in a net but lay the fish out. With cottom swab dipped in the peroxide gently dab on the columnaris. Keep out of eyes and gills. give it a second or two to bubble and boil then put fish into clear water. This stuff eats the hide off the fish so again, be careful and have EVERYTHING laid and and ready. Do not combine with the salt.. salt in wounds burns. And water conditions is a cause of the columnaris so extra care in keeping water pristine.