Keeping Zoas???

[ocean diver]

I didnt dip the zoas, I have a yellow tang, powder blue tang, RS sailfin tang, mandarin, midas blenny and my tank is a 110gal and back then when I had zoas I had T5's for lights, now I have LED's. I also use a euro reef skimmer and a 30 gal sump. I feed the fish a mixture of foods from flake to brine and clam/squid plus the algae sheets for the tangs. I have lots of other corals in the tank all seem to do well.......but not the zoas!!!!!