I would just feed like, seaweed on monday, mysid on tuesday, kinda like that. That way, if they both eat it you will be sure the tank gets waht he needs and the firefish gets what he needs.
BTW, emerald entree contains more than just Nori I think, has some mysis and stuff too.
BTW, if you want some greens for Tangtastic, try spirulina flakes, my tang flips out for them.
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