What does my tongue have?

I have a blue hippo tang that we got a few days ago and he’s been swimming around happy for the last several days, but last night some strange discoloration has shown up on his body. We dip all fish and coral before they go in the tank to make sure they’re free parasites, and other funk.

We have two tangs in this tank. A tomini and a hippo. Both of my tangs have the same thing on them.

we have treated the tank with the ruby reef rally and just started the kick ich last night.

Does this look like Ick or something else? Anything we can do to cure this fast so we don’t lose any fish?