What food?

Wouldn't know where to start - mine eats everything:) I do a mixture of mysis shrimp, herbivore diet, mussel, cockle, and mix it all up in a bottle.

Also make sure that you have Nori Seaweed sheets available for continuous grazing.
 
i feed my tangs a mixture of green,red and brown algae strips also formula 1 and 2 flakes...some brine and mysis shrimp...plus i leave the algae to grow on my back panel of the aquarium for them to graze on and they seem to be doing well on that diet :)
 
seaweed salad and nori every day.
mysis 2 to 3 times a week.
cyclopese 2 times a week
live brine whenever available.
formula 1 and 2 flake.
thats my feeding chart
 
New Life Spectrum sinking pellets and Seaweed sheets. Mine always stayed as yellow as a ripe lemon.
 
Whatever you decide to feed, just be sure to keep it diverse, with a heavy emphasis on algal matter. Otherwise, there are no hard and fast formulas or anything like that.
 
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