That study is a little swayed, obviously a tang fed nothing but sea lettuce (the seaweed equivalent of iceberg lettuce) is going to develop some pretty bad deficiencies. Commercial prepared (enriched) pellets and disks are far superior to something like that though should probably still be supplemented with a variety of foods. I've seen video of a yellow tang eating a chunk of banana.
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Calvin
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Planning a 29 gallon mixed reef...
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