Engineers to boost bio-diversity in your reef aquarium! Besides simply holding coral frags, our PolyRok Bio Matrix Media Magnetic Frag Rack with Self-Locking PolyPlugs featured a Bio-Matrix Habitat (a multiplex internal geometry), that acts as a biological filter media to promote beneficial bacteria colonization and pods growth. The addition of PolyRok­™ racks to your reef tank means increase in bio-diversity, which will result in more water stability for your reef tank!

One innovative feature of our PolyRok™ frag rack that stands out include the Self-locking PolyPlug that lock itself down to keep bulldozer critters such as turbo snail and hermit from knocking off your prized frags. Additionally, the PolyPlug’s stem can be snapped off easily to transfer your grown out plug to the hardscape. All in all, a perfect option for nano tanks up to 1/2″ thick glass/acrylic!