Worst nightmare

I always knew this day would come.

I got a silver spotted ancistrus last week, finished quaranteen with no
visible signs of anything, moved it into the 90g tank. Couple days later, 3
bala's are covered with ich, one pictus cat is disasterously covered with
it, and some of the other inhabitants have it on their tails (as feared, one
of the clown loaches included). Majority of the tank inhabitants don't show
any signs. Guess some of those silver spots weren't natural coloration.
I've never seen a fish so covered as the pictus cat, I feel so sorry for
him, there's not a spot on his body that doesn't have a white dot.
So now the chore begins, treating a 90g tank for ich with multiple breeds
and sizes of fish, including multiple scaleless fish.

To start, I've gradually increased the tank temp to 82, added 1 tbsp per 5g
salt as prescribed. Change the micron filter daily.

Anyone had success with just elevated temps and salt, or does it always
revert back to having to treat the tank?

Cheers