I've never tried any and I never will. Whats the point if you can achieve results like this without them? Why not spend your money on more exiting purchases like new coral and your time on researching how to achieve optimal reef chemistry? Coraline grows exceptionally well when provided adequate calcium and magnesium, undetectable phosphate and slightly elevated magnesium (in my humble opinion). For bonus points theres a tailspot blenny in this picture.
