Brightwell Aquatics Xport-BIO Block Biological Filtration Media for Bacteria Growth and Phosphate Reduction Experience elevated aquarium care with Brightwell Aquatics Xport-BIO Block Biological Filtration Media for Bacteria Growth and Phosphate Reduction. Ideal for marine and hard freshwater enthusiasts, its engineered for pH 7.5+.

These blocks excel with unmatched porosity, offering the largest usable surface area per unit weight or volume among all media. Lab-tested for exceptional performance, each block provides over 40,000 sq. ft. of surface area per liter, ensuring efficient bacterial colonization. Reduce toxic levels when properly colonized.

Versatile and easy to use, they can be the sole medium or complement others. Doped with Aragonite to buffer pH, by preventing acid buildup. Available in 1.5-inch and 2-inch sizes, with clear guidelines, XPort Bio Blocks create a sustainable, healthy bacterial ecosystem in your aquarium.

Whether setting up a new tank or maintaining an established one, choose Xport-BIO Block for a cleaner and healthier aquatic environment. American-made excellence Trust in the quality and excellence of Brightwell Aquatics, an industry-leading brand committed to providing innovative and scientifically backed aquatic care products.

Made in the USA, we consistently strive to deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium.