Aqueon Coarse Foam Pads Large for QuietFlow 300 and 400 Canister Filters [Aquarium Filter Pads, Aquarium Scrapers And Scrub Pads, Aquarium Supplies] Large - 12 count

Biological and mechanical filtration. Provides large surface for beneficial bacteria growth. Manufacturer #: 100528520 Size: MD/LG UPC Code: 015905000215