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Biological Filter Foam
Comes standard in all BioStyle models.
Traps debris and waste and also offers surface area for beneficial bacteria to settle. This mechanical and biological filtration results in cleaner, healthier water for your aquarium inhabitants.
This 30 ppi filter foam should be replaced after 12-18 months, depending upon aquarium size, number of fish and plants, and declines in filter performance.
Replacement foams are available in a 2-pack