Im changing my lighting over from t5s to a 400W MH(20 000k). Mounting the MH 20 inches from the water surface. Im thinking I will have to move my Green Bubble coral down ( currently at the top of the tank ) I also have another bubble ( Purple) half way down the tank. Can I place the Green beside the Purple without them having a Chem war and stinging each other or being the same family will they get along like lost siblings?