I've had good success using Acro Power along with Red Sea Coral Colors. I also perform additional feedings throughout the week using a variety of the following foods, Elos Omega Amino Acid , Reef Chili, Coral Frenzy, Oyster Feast, Cyclop-eeze, and Reef-Roids.
I have found that giving the corals a variety of different foods helps keep them very healthy.
Btw the tank for this experiement is a all glass 15 gallon with a signle 150w MH Phoenix bulb, no fish, just a good clean up crew that I add to as necessary. Also running without a sump and have a hob skimmer, also run GFO and carbon.
Cheers,
Alex