I been using it for about a month now. I take a pinch mix it with sea water and use my large turkey baseter to feed each coral at night only. To early to tell if its a good product
I've been using it also but like salty dog, I am not sure. one thing I can tell you is that when you put this in the tank corals open up to feed without any problems. It's amazing how they respond to coral frenzy.