fungus spreading?

[FinnBar]

Hi there. I got a phal as a present. the roots turned out to be rotted and the pot had fungus growing on it. I removed the plant and trimmed all dead roots, lots of them. it was left with just a couple. i treated it with cinnamon. if i put it in my tank to heal do i risk the fungus spreading into the Aerangis inside the tank, humidity is 90+?
no visible signs of fungus on the phal.
Antti