API Crystal Bio-Chem Zorb Refills

API CRYSTAL BIO-CHEM ZORB filtration cartridges remove compounds with an exclusive, research grade resin-carbon blend that carbon alone cannot remove. CRYSTAL BIO-CHEM ZORB filtration cartridges make water 3X clearer than competitive filters. The double layered pad removes debris, while the resin-carbon blend removes colors and odors from aquarium water. Use when starting an aquarium or during regular maintenance to remove aquarium pollutants.