How do you resist...

[Diomedes]

Be very careful feeding Tangs Nori in a Q-tank. They tend to rip it up and send particles flying everywhere, which get trapped in your filter ( I assume you have a Hang-on) or just accumulate in deadflow spots and rot. You might have to clean your mechanical filter more often or siphon out the junk through a fine mesh net. This is why sometimes I feed Romaine instead (it won't break up), but I feel that Nori is a better, more suitable product.
Also make sure that if you are buying Nori from Asian food stores that you aren't getting "Roasted" Nori. You want the just plain "dried". You probably know this but just checking.

Feed him what you can without polluting the water. Don't overdo it. The Naso pair was in a tank several thousand gallons in volume.

Cheers,
Stephen