I use it, and like everyone else, really like it.. I spot feed about every other week and weekly turn off my return pump and let it circulate in the tank for a hour. I have a mixed reef tank right now but everything really seems to like it. Zoas, palys, lps (frog spawn, hammer, ect) and all my sps. I throw several things in when I let it flow for a hour but the chili is the biggest part of it.