Aqua One 403s Blue Sponge Pads – For Advance 1050/1250 Canister Filters – 2 pack

A new 403s twin pack of blue coarse Aqua One Sponge for the Aqua One Advance 1050 and Aqua One Advance 1250 external Canister filters. Open cell foam makes superb water filtration material because it both traps debris and acts as a good home for nitrifying filtration bacteria.