what other fish do you have in your tank.i suggest ditch the brine all together it have little to no nutritional value to sw at all.its like popcorn to humans saticfying for the moment but isnt fortifying nutrition.your list below
1/4 cube frozen brine(ditch it)
1/4 cube frozen mysis(very high in protien)
14 drops of live refridgerated phytofeast(coral food)
1 drop Kent Zoecon(ok but selcon is more advanced and contains more nutrients for fish and inverts alike great for presoaking foodsto boost nutrients)
4 drops Kent Zoe
2 pumps frozen Cyclopeze(good for corals and small fish)
10-20 drops of Coralive Liquid Gold Pro Plus(also for corals)
A pinch of Dainichi Reef Veggie FX (baby size, sinking)( i persoannly use thera+A pelets for all my fish very high in nutrients and vit for all fish one of the best available(pellets)also combats paresites naturally) fed 2x per day
A couple drops of Garlic Juice(i prefer garlic extreme higher cancentrates of vit c than fresh clove or garlic juice).
harbivores have very high metabolizms making multipul feedings per day a must.their diet requires 75% plant and algae based foods 25% protiens(meaty)
if using nori(dried algae sheets) the red variety holds more nutrients than the green( i was told this personally by the head ichtyolegist of the Tolado Zoo aquarium)I use this as a treat or added to prepaired pm feeding all soaked in water with garlic and selcon b4 feeding..pm feeding for all my tangs and herbivores consist of emerald entrese frozen (algae cubes with mysis ) formula 2 by acean nutrition(algae cube).I have other foods i add for other species i keep all mixed into a cup mixed and poured into the tank at one time but these are the ingredience added for herbivores(tangs, foxfaces ect.) periodicly(2-3 times per week) i add veggie flakes by omega one to the midday feeding along with the pellets for extra veggie content.

ps nori (seaweed sheets )sold in grocery stores is dry roased which in this proccess removes most nutrients needed for these fish.sheets prepaired for fish is not cooked and not meant for human consumption