So I came home from my thanksgiving vacation. Had the Eheim auto-feeders running for the 17 days I was away from school on my 10g and 29g. I come back and My sorority is dead. Columnaris outbreak at some point while I was away. I know this because I had 2 girls left with very white lips left of the 9 I had in the tank. I tried to QT but they died that night. I noticed that I lost half of my female guppies as my ratio that was 1:2 is now 2:1 male to female in the guppy pool. Also had 8 cories and I am down to 6. Sadly I do not know where most of the bodies ended up. There was only 1 betta stuck to the filter and I see the remnants of one fish skull, which appears to be a betta due to its size on the floor.
I guess my next question is how do I go about cleaning the tank? I still have a dozen fish but I assume they will either all eventually succumb to Columnaris. I do not have room to QT all of them as I only have a single Gallon QT tank and a couple of betta cups that I had bought the girls in. Do I need to do a 100% water change and kill my cycle and recycle the tank or what is needed to be done? Also if i remove the fish will the Columnaris die off on its own without any hosts or can it still thrive on plant matter as I have it pretty well planted at this point?
Any help advise would be greatly appreciated