Combination chemical filter media keeps aquarium water healthy and clear Removes dissolved organics, heavy metals, and discolorationPlace easy-to-use, flow-through media pouch in any filterResearch grade combination chemical filter media in a convenient flow-through nylon pouch. Bio-Chem Zorb contains a variety of research-grade organic scavenger resins, natural ion-exchange resin and high-porosity activated carbon. The result is superior removal of organic pollutants. Removes aquarium pollutants including colors, odors, heavy metals and toxic gases. Also improves water clarity and will not remove trace elements from saltwater. Safe for freshwater or saltwater. Each pouch treats up to 55 gallons. 5 oz Mini Bio Chem Zorb is perfect for nano reef aquariums and other small systems under 20 gallons. 5 oz pouch treats up to 20 gallons.Please click on "More Information" for additional benefits and directions for use.

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