REEF BIO-Gro Algae Reactors – Available NOW! Stop growing algae in your aquarium and start growing it in our REEF BIO-Gro Algae Reactor! Reducing nutrients including PO4 & NO3! This is an advanced, compact reactor specifically designed to grow macro-algae, which can be used to reduce unwanted nutrients such as nitrate and phosphate from your reef aquarium and also help improve water quality. The REEF BIO-Gro includes a high performance, double-sided LED board using AquaRay technology and Samsung