I'm new the saltwater hobby. I converted my 55gal. Cichlid tank to a reef tank back in December. I put the live rock in on Jan 18 and it seemed to start with lots of growth from the first week or two. I have a 250W Metal halide light with two 40 watt NO flourescents. An Emperor 400, Berlin Skimmer and one 1450 Marineland powerhead. My live rock now has a lot of green hair algae growing on it. I have noticed under the rocks a few pink spots starting to emerge. I assume it is coralline. If it is coralline, can I just turn over the live rock and let the powerhead spread it. Or will that kill off the hair algae and cause a spike. All my levels are good in the tank. Good water quality. I have 2 percula clowns, 1 cloudy damsel, 1 spiny oyster, 3 emerald crabs, and a pink tip haitian anemone in the tank right now.