I'm dosing sea chem reef plus right now. Most of my corals have actually coloured up a lot. Read in RC that Brightwell Aquatics CoralAmino is also very good and effective so will be trying that out also. Of course not forgetting Prodibio Reef Booster.
Vit C is also supposed to help in coral colouration but some posts in RC mentioned that once you stop dosing Vit C, the corals will deteriorate so not taking the risk now.
Food wise, I'm feeding my corals with my own frozen food mix, Henry's, frozen brine/mysis/daphnia and zooplankton, rotifier and copepods.