Fluval U4 Filter Media - Poly/Clearmax Cartridge, 2-pack Size_168ltr Pellets: These offer additional protein

Pellets: These offer additional protein and are designed to sink

The Fluval Replacement Canopy cover in White is suitable for the Fluval FLEX 57L aquarium kit

Powerful team of beneficial bacteria immediately innoculates aquarium water

Here are its key features and specifications:

Fluval U4 Filter Media - Poly/Clearmax Cartridge, 2-pack Size_168ltr Pellets: These offer additional proteinFluval Poly Clearmax filter cartridge helps control green water and unsightly algae growth by adsorbing and trapping phosphate, nitrite and nitrate. It effectively produces crystal clear water, reduces odors, and creates ideal conditions for fish and plants. The filter cartridge helps reduce overall aquarium maintenance. It is ideal for freshwater and marine environments and designed for Fluvals U4 Underwater Filter. Contains 2 cartridges