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Replace polyester pads at least monthly depending on your aquarium set-up or application. The Fluval 4 Plus Polyester Pads have been specially developed as a standard filter medium for the Fluval 4 Plus submersible filter. The poly pad design maximizes surface contact between the water and the media.
The Poly Filter Pad has been specially developed as a fine filter medium for the filtering out extremely fine suspended particles and contaminants also known as water polishing.
Replace polyester inserts at least monthly depending on your aquarium set-up or application.
Contents: 4 pieces