For all the aquarium hobbiest, is it safe to use Pimafix, with Furan-2 & Kanaplex?

Guppy fry that I recieved from eBay have infected my tank with this white contagious bacteria like fungus. They have spots on their body that looks fluffy almost like cotton. And this ilness has already killed one of my fish and now 5 others have the same stuff on their bodies.
I immediately moved the ones I could tell were infected to a quarantine tank and have lowerd my water temperature past 75°F. Now I just have to wait until the medication arrives tomorrow.
After doing some research, I was certian that they have columnaris, but after a little bit more research I found something that also looks almost identical to columnaris, cotton wool disease. So since I'm not 100% sure if they have one or the other, I plan to treat them with both medications just to be thorough.

So I was wondering if it was safe to use Pimafix with Furan-2 & Kanaplex.
For all the aquarium hobbiest, is it safe to use Pimafix, with Furan-2 & Kanaplex?
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