42 packs 306/307 canister filter replacements compatible with Fluval 306/307 aquarium filters. Includes filter media set with biofoam, activated carbon, and ceramic rings. Upgraded version. (2)

Compatible models：306, 307 Canister Filter Compatible with Fluval 306, 307 Aquariums, Replacement Biological Sponge, Activated Carbon, and Ceramic Rings, etc. 42-Piece Filter Media Set, Recommended Replacement Every 2-4 Months

Special Value Pack: Replacement media for 306 and 307 canister filters includes 4 white sponge filters, 4 blue bio-foam filter cartridges, 4 black bio-foam filter cartridges, 8 green phosphate-binding foam filter blocks, 8 white foam filter blocks, 2 packs of ceramic rings, 4 packs of activated carbon, 6 white mesh bags, and 2 pieces grease

Biological foam filtration: The 306 and 307 filter media sponges are designed as corrugated biological foam filters, increasing the surface area by 35% to capture dirt and particles, increase water flow, and serve as a preliminary water quality filter.

The benefits of activated carbon: The activated carbon in the 306 and 307 filter tanks has a large number of microporous structures that can adsorb odors, pigments, and some organic pollutants in water, making the water clearer. It can also adsorb chlorine gas, heavy metal ions, and other substances in water. When used in conjunction with a filtration system, it can improve water quality safety and provide a more suitable living environment for aquatic organisms.

Ceramic ring function: The ceramic ring inside the 306、307 filter replacement part is porous and loosely structured, which can filter harmful substances in the water, assist in water purification, and help establish a stable aquarium living environment system. The polished pad can capture floating particles to obtain clear water

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