ok so i have to say this skylar before ed gets in first lol, i also thought they thrived (fungus that is) at higher temps but i was informed that wasnt the case, it just seems it prefers higher temps because it takes hold then, it only takes hold because the stress caused by heat lowers its immune system...
yan, im surprised your axolotl isnt dead! most tropicals dont even like that heat (with the exception of discus etc). id seriously consider lowering that temp by fridge, esky or ice bottles... i doubt fans would work too well at that temp