Red emp. Snapper

[OARrocks]

Im pretty sure the little guy has ich. i only have live rock in the tank as well as a panth. grouper and an eel. Hes starting to get little flaky white spots on his fins and is rubbing against the substrate as well.

has anyone had any experience with treating predators like this in a tank with only live rock. there is one piece of rock with GSP on it. I dont have anywhere to QT. him, so i would like to treat him in my tank with whatever suggestions anyone may have.

thanks for any replies