I have a 240 with 8 fish in it. 2 lyrtail anthias, 2 clowns, 1 naso tang 1 yellow tang and 1 powder blue tang. The powder blue has ich, i only have a 10 gallon tank to set up to treat. Should I leave the powder blue in the tank and see if it runs it coarse or take it out? There is no way i can catch all the fish so is it worth just treating the powder blue? If i treat and put back in im sure he will get beat up. Suggestions