Fits Marineland Bio-Wheel 170B, 200B, 330B & 350B.;A perfect fit for every filter.;Meets the highest standards of water purification and operational ease.;Each cartridge is pre-assembled.;These ready-to-use cartridges allow your media to be changed quickly. Just rinse and then drop them in. Cartridges provide a double thick poly fiber pad on one side to efficiently trap dirt and debris. The other side quickly removes dissolved pollutants by means of a patented ribbed backing that evenly distributes the super effective Black Diamond Carbon.
Trustpilot
5 days ago
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