with that diet hes bound to get ich.tangs are herbavores they need veggies ,yes they will at meaty food but they have to have greens to survive btw brine is a waste of money for any sw fish it has the nutritional value to fish as popcorn has to humans its ok as a treat but not as a main food source.here is a list of good food that will help keep your fish healthy:
Flaked:Omega One .veggie flakes or Kelp flakes
pellets:Thera+A antiparestic non medicated formula(this will help get rid of the ich)and help prevent it.
Fozen:emerald entrese(algae based with mysis and brine)
formula 2 aglae cubes
seaweed sheets:seaweed selects and color will do.
these are the brands I use for mine they do have others simular but your tang needs these special diet to remain healthy.if you have a mixture variety of fish you realy need to make sure each species has its daily requirement of nutrients.
herbavore
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
lant life diet,such as macro algae kelp seaweed and so on.meaty is ok as part of its diet but will not sustain health in fish alone.
omnivore: meaty and plant life type foods needed to ensure balenced diet
carnavore:meaty foods such as krill, shrimp, silverslides ,scallops, squid mysis shrimp ,even crab variety of these foods will benefit your fish the best.
tangs need to be fed 2- 3 times daily
example of my feeding schedule: pellets in the Am,afternoon snack veggie flakes and seaweed select sheets after the flakes are gone I add the sheets Pm feeding frozen menue.I do this daily for 4 tanks. heer is a link to help you out in this matter
http://www.wetwebmedia.com/ca/volume.../nutrition.htm