Use Biospheres in a solid media reactor to remove nitrate and phosphate from the water.
I've been using biopellets in my reef since February 2011, and love the freedom it provides for me to feed my reef often. My fish are fat, the corals are vivid, the water quality stays in check because of the polymer media. For my full write up about biopellets and how I use them, here's my article with tips and suggestions: http://melevsreef.com/articles/biopellets
Reef Octopus's BioSpheres 1000ml
I sell these because I use them.
100% Natural Polyhydroxyalkanoates (PHA) rounded pellets