Aquaforest AF Bio Sand is a premium white substrate designed for saltwater aquariums that jumpstarts the nitrogen cycle and establishes biological filtration faster than standard sand. It comes pre-packaged with lab-cultured nitrifying bacteria and nutrients to support rapid colonization when activated in water.

Made from high-purity calcium carbonate, this ultra-clean bright white sand helps maintain stable pH and alkalinity levels within the reef tank environment. The grain size is specifically calibrated at 1-2 mm, and the 7.5 kg bag includes two bottles of activation solution to be mixed with saltwater before adding the substrate to your system.

This product is best for new reef tank builds or aquascapes looking to stabilize water chemistry quickly without extended cycling periods. Aquarists seeking a pristine aesthetic combined with enhanced biological stability will find this sand ideal for promoting a healthy colony of beneficial bacteria from the moment of installation.