API Rena Filstar XP Super Micro Filtration Pads 8211 2 pack

API Rena Filstar XP Super Micro Filtration Pads The API Super Micro filtration Pads are for use with the API Filstar XP filter, and contains a dual density microfiltration pad with gradual thickness that removes the smallest particles before water is returned to the aquarium. Due to its dual density, its ability to remove dirt is 2 times greater than conventional pads. Product is most effective after routine water maintenance. DIRECTIONS FOR USE: Replace the pad every time the water is changed, or at least once per month.