hi Sahin, yes I only feed brineshrimp to the fish, I don't know if this diet is sufficient but my fish looks fat, healthy and clowns breed regularly, and they are on this diet from I don't know 3-5 years ? Of course I've tried different types of food but find they dont work for me, mysis and nori elevated phosphates in my tank. I've tried pellets Formula 1 and 2, but only clowns are interested in, the others refusing to eat them. There is plenty of "natural" food for tangs in my tank, and they are greasing rocks all the time. I've examined feces (dirty jobs:)) of Yellow tang recently and find they consist of about 60-70% green algae fragments. May be brine shrimps provide only small "protein" part of their diet.