Thanks for the info....
I have several corals in there including a frogspawn, big harry mushroom, lots of zoos, star polyps, bubble coral, and a brain. I dose a two part calcium supplement but the calcium as at a good level so I havent dosed for probobly 2 weeks (stays around 400).
Would a low dKH be whats making my corals look a little dull? I thought it might be that the tank needs some new lighting but the CO2 in the water makes more sense. I am going to add an airstone, and do some water changes....Hopefully that will help! Thanks!