Nori should be a suppliment fead 2 or 3 times a week. He is an omnivore and needs meaty food also. Its best to feed 4 or 5 types with flake and frozen and nori. But if you feed him to much then he will may pick less at algea in the tank. JSYK. GL..
I have 7 tangs, a rabbitfish and 2 prymid butterflies that destoy a sheet in minutes. One sheet a day will be fine. 1000 sheets divided between 3 people will still go a long long way.
owner of a tang free tank have rabbitfish though I do the asian market though oddly never had a fish that liked nori including tangs yes I had a couple back a ways just seems like everybody wants to have them so they can. :hammer:mine tend to like the red algae