I was wondering is it beneficial to feed a tang greens to give it everything it needs nutritionally? I don't have any plants anymore from him eating all of it , loves mysis and healthy but never supplemented with any type of greens like algae disks.
The bulk of a tang's diet should be vegetable matter. You can find dried seaweed sheets at Petco, Petsmart or your LFS. You can also buy a suction cup clip to hold the algae up. I would feed an algae sheet about 3 times a week for the tang.