BIO-ROCKS MEDIA - 0.5 CUBIC FT

Atlantic Bio Rocks are the perfect accessory for Atlantic FilterFalls Pro Series and Oasis Series Waterfall Filters to keep water healthy and clear. The 0.5 cubic feet pond filter rocks have all the surface area but weigh 25% less than traditional lava rocks and half the weight of gravel expanded clay. Atlantic Bio Rocks filter media is a less abrasive and stable alternative to heavyweight bio-media!