I had a case of strange... "columnaris" that disintegrated their fins. One had orange "clump" of it on her fin, and died. Marge and Tina got it as dark blue clump... I actually had to choose to amputate the infected areas on Marge, which healed back... Weird how sometimes quick actions (and out of the box thinking) can do so much...
But it is good you've been able to treat the fella. I say, then, if you have the space and ability to keep the tank warm, you should get the fella.
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.