Check the listing for details. Xport-NO3 1/2" Cubes (150 GM) - Brightwell. Condition: New. Listed at 13.99 USD. Ultra-activated Denitrification Media with Superior Performance Characteristics Overview Utilizes NanoIntelex Technology to create an enhanced, "ultra-activated" material with the capacity to outperform conventional denitrification media by over 300% Open structure and high surface area results in superior flow-through characteristics and filtration efficiency. Higher efficiency relative to conventional media results in smaller space requirements to achieve equivalent denitrification. May be employed to rapidly decrease nitrate in even the most heavily-stocked systems. Eliminates the need to perform water changes that are carried out for the express purpose of decreasing nitrate in an aquarium system. May be used in conjunction with Xport-BIO and Xport-PO4 Listing and template services provided by inkFrog