🔬 Brightwell Aquatics Xport-BIO Block - Bio Filter Media for Bacteria Growth & Phosphate Reduction, 4 Pack, 1.5 Inch, Model XPBLOCKBIO1.5in-4pk Review

Designed to be used in marine and freshwater aquariums with a pH of 7. 5 or higher. 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; One 1. 5” block has about 4, 000 square feet of useable surface area. Reduces toxic ammonia and nitrites to near zero in ponds and all aquariums, marine or fresh; also reduces phosphate significantly and dissolved organics. Doped with Aragonite to buffer pH at the bacteria level, preventing acid buildup; Works excellently as the only filtration medium or may be used in addition to other filtration media.