Columnaris In Qt Tank, Now What?

I have a newly cycled 5 gallon quarantine tank. It's been running for about 2 months now. 12 days ago I bought 6 guppies from a LFS. 4 females and 2 males. The next day I noticed a white saddle on one of my guppies, the next day ot professed to having lesions on it and she died a few days later. I had no idea what happened but figured the stress of a new tank and a male that I saw aggressively trying to mate with her was to blame.
Since then, I have lost 2 more fish with today being the most recent . Neither of these fish that died showed any signs.
BUT today I saw another one of my remaining 3 guppies has the dreaded saddle white patch.
I had been doing water changes every other day because of ammonia spikes, but all other levels have been normal.
Also, 3 days ago I started dosing a trio of meds suggested.

What do I do, I've been searching the internet and I'm so confused.
Also, does this mean that my QT tank is always going to have this bacteria in it now and there's nothing I can do? If somehow my other 2 guppies survive by some miracle, will putting them in my display tank make my display tank always have it? Currently, display tank is a 45g with nothing in it.

:'( any help would be appreciated

 

3 trains of thought to fight columnaris. Antibiotics, hydrogen peroxide or potassium pomegranate. Antibiotics help control the spread were the other 2 kill it directly.

 

3 trains of thought to fight columnaris. Antibiotics, hydrogen peroxide or potassium pomegranate. Antibiotics help control the spread were the other 2 kill it directly.

So right now I have Maracyn NOT Maracyn 2, do you know if this will work? The box says it will treat it, reports uve read online say it wont.

 

No columnaris is a gram negative infection and Maracyn is for gram positive infections.
Potassium permanganate - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki

Peroxide How To
You can read these over and see if your comfortable doing one of them.

 

No columnaris is a gram negative infection and Maracyn is for gram positive infections.
Potassium permanganate - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki

Peroxide How To
You can read these over and see if your comfortable doing one of them.

I think I'm most comfortable with going with the Furan 2 and Kanaplax. Nowhere in my town can I get either, so both of them won't be here until Wednesday at the latest. Here's my question to you if you don't mind me asking.
These fish were put in a quarentin tank. There are currently 4 in there with only 1 showing signs/symptoms. I haven't introduced any fish yet to my 45 gallon. Should I keep all fish in the QT tank and treat them all when the products arrive, or should I try to save the current ones who look and are acting healthy by placing them in the display tank?

 

I would treat all the fish that are currently in qt since they have been together. What effects one usually effects them all though all might not show symptoms.

 

Sorry your having to deal with this, I went through it about 3-4 mo. ago, lost two of my apistogrammas, I can help with a cure. After losing all in that tank I trashed the substrate, heavy bleach soak and if it could not be boiled it was thrown away.

 

Sorry your having to deal with this, I went through it about 3-4 mo. ago, lost two of my apistogrammas, I can help with a cure. After losing all in that tank I trashed the substrate, heavy bleach soak and if it could not be boiled it was thrown away.

It sucks to have happen, especially the FIRST ROUND OF FISH
I'm still debating what I want to do with my tank.... It took me so long to get it going, I hate to loose everything good in my sponge filter. From everything I can find, it sounds like this bacteria is always just sitting around, waiting for an opportunity.....