Marineland's Penguin 100 - 200B Extension Tube is for the 100B, 150B, and 200B Power Filters. The length of this extension tube is the same as the length of the tube that fits in between the intake strainer and mid-level strainer in your bio-wheel filter. Perfet to help evenly filter your aquarium water (especially useful for extremely tall aquariums.
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*A mid-level strainer (sold seperately) is necessary to connect to the intake tube
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