Fluval U3 Poly-Max cartridge helps reduce overall aquarium maintenance by controlling green water and algae growth. It effectively produces crystal clear water, reduces odors, and creates ideal conditions for fish and plants.

The cartridge works by adsorbing and trapping phosphate, nitrite and nitrate.

Ideal for freshwater and marine environments.  This cartridge is designed for Fluval’s U3 Underwater Filter.

Pack contains 2 cartridges.

Spare media for the Fluval U3 Filter