I was lucky enough to get one of the first bottles when Randy came to speak at our reef club in October. My corals have responded well to this product. Polyps and tentacles start coming out immediately. I've recently rebuilt my system going BB, adding Lumen Brights, a Deltec skimmer and calcium reactor. I didn't add fish for two months and have been feeding Oyster Feast, cyclopeeze, and a homemade "gumbo" and my corals are showing great color and growth unlike anything previously.