yeah before my cleaner shrimp died my powder blue did, it helped with the ich the cleaner did, but thats it. when he stopped cleanin it was hell on the fish. im going to stay away from tangs unless i have a huge(1000G) aquarium and every cleaning equiptment out there. you should really start talking with some of these tang people they have tons more experience than me, and mine isnt good, im stick to easy maintence hardy fish.