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Save an extra 20% off your entire order with coupon code: HOLIDAY20
*May exclude certain brands.
**May not be combined with any other offer.
Code expires 12/13/13
Fluval U Series Filter Poly / Carbon Cartridges have two sides for the most effective filtration. The U Series Cartridges is a polyester filter pad which filters out fine debris and contaminants and a carbon side which filters out harmful liquid substances, colorants and odors. Please see below to find the proper cartridge for your U series filter.