Bright well Aquatics "Xport BIO Brick" is a high porosity, dimpled filtration brick that boasts the largest useable surface area, per weight or volume, of any filtration media in the world. Each brick provides over 71,000 square feet of surface area per liter of medium, and 100,000 square feet of useable surface area for bacterial colonization, and is also doped with Aragonite to buffer pH at the bacterial level. Works excellently as the only filtration medium in the system, or in addition to other filtration media.

• Superior-grade filtration brick has the highest porosity and largest useable surface area, per unit weight or volume, of all filtration media available anywhere
• Provides huge amounts of aerobic and anaerobic surface area for efficient bacterial colonization
• Provides over 71,000 square feet (6,596 square meters) of surface area per liter of medium
• Each brick has about 100,000 square feet of useable surface area for bacterial colonization
• Doped with aragonite to buffer pH at the bacterial level, preventing acid buildup which could eventually kill the beneficial bacteria