Not knowing what size your tank is makes it a little hard to give options. For a smaller tank under 75g I probably would go for the bucket method. Just to be safe. Depending on your situation I have set up a couple of small tanks that I alternate between with aged water that I keep heated to the same temp as the tank. When I have to do a water change I just drop a pond pump into the water tank being used next and fill up. Another option if you are not too far away from a tap that has both hot and cold is to get the water the right temp then attach a hose and fill you tank that way, remembering to put the declorinator in before hand.
As for the temp it is recommended when treating columnaris to keep temp at arount 75 - 77 degrees. Ditto on the swimbladder problem epsom salts.
Good luck and keep us posted.
Cheers
Man sorry to hear its gone south.
I think you should move to Maracyn 2 as it really seems to have taken hold. If possible, I would even consider buying say a 20G Long tank, set it up as a hospital, remove fish the minute it appears on them and treat in there.
If you're really struggling to get the temperature down then try floating frozen half full pop* bottles. I'm given to understand it's quite key to treating columnaris.
*soda if you're American![]()
your powerhead is putting out heat, you are right. i would leave the temperature be and not fight it, because you make things worse by having it bounce around. leave it alone. maracyn-two is good med, so you can just treat the whole tank without moving the fish. just run the med 5 days like you should and only worry about water change during treatment if your parameters aren't good. if you think that med helps but fish still needs another treatment to fully recover, then do a huge water change, give it a day of break and then run the med agan the same way you did it the first time. do not use any other meds at the same time. most other meds will screw with your bio filtration or will be too much. make sure your heater is plugged in so that the temperature doesn't go over 76 but doesn't let it get much lower than that over night. for now feed your fish what they will eat, later they should start eating better. don't worry about nitrates right now. also, 10ppm isn't a big deal at all.