"Exxodus-BAC Brick"， Sized 9" x 4.5" x 2.5" for biofiltration， 1 Brick[Product Information]- Highest Porosity and largest useable surface area， per unit weight or volume， of any 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. One plate has about 125，000 Square feet of useable surface area for bacterial colonization
- Doped with aragonite to buffer pH at bacteria level， preventing acid buildup which eventually would kill the bacteria and reduce capacity. (Which is what happens in competing products).
- Works excellently as the only filtration Medium for the Aquarium or pond or may be employed in addition to other filtration media.
