If you listen to Red Sea 12DKH for accelerated growth. But again you have to have the nutrient level to support it. Otherwise what end up happening is what we call "burnt tips" in SPS. The skeleton grows, but their is no nutrients to support tissue growth. So you get large white tips with no tissue(they look literally like someone burnt them).
What are your current levels?
What we typically reccomend for a newbie starting out.....
7 to 11 DKH
400 - 450 CAL
1300 MAG
Nutrient levels(nitrate and phosphate) can be anywhere as long as they are detectable on our hobby grade kits, and not 0's.