Fluval U1 Underwater Filter Replacement Foam Pads help to filter water mechanically and biologically. Change these inserts regularly to make certain that the water in your aquarium is clean, clean and healthy for your pet(s).
Features: Replacement foam pads
Includes: 1 Pad
Intended For: Fluval U Series Replacement Filters
Be sure to change this insert regularly for optimum water clarity and quality.