I finially got my hands on one of them! I'll be posting pics, but this is what I have on hand to feed it, Romaine lettuce, Green calurpa, Nori, brine shrimp, bloodworm. is there anything else they love?
I'd say seaweed, mysis shrimp, algae wafers, etc. I've had several Tangs in my time but never a purple one- from my experience, they're not very picky about anything. Hehe.