Atlantic Water Gardens Bio-Rocks Filter Media Size:0.50 Cubic Feet Maximizes efficiency for all filters

Maximizes efficiency for all filters without restricting flowrate

While many types of aeration tubing float to the surface

heal surface damage

since each outlet is fully adjustable

Betta and breeder tanks and beginner aquariums

Atlantic Water Gardens Bio-Rocks Filter Media Size:0.50 Cubic Feet Maximizes efficiency for all filtersAtlantic Water Gardens Bio Rocks filter media are an effective, lightweight biological 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! Comes with a 5 year warranty. SKU UPC Code Description BB0500 727429001103 Bio Rocks, 0. 50 cubic feet Bulk size ships by truck freight, which requires that you be present