A new type of biological media for your FilterFalls, half the weight of gravel but with greater surface area! More stable and less abrasive than lava rock, Bio-Rocks are the perfect alternative to heavyweight bio-media.
With all the surface area but 25% less weight than lava rock and half the weight of gravel, expanded clay Bio-Rocks are the more stable, less abrasive alternative to heavyweight bio-media!
Box contains 1/2 cubic foot of Bio-Rock Media
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Lava rocks and gravel just kept trapping waste in my creek. I wanted something good for bacteria colonization and to look good. This was a perfect fit. A good natural look with the function I needed.