Cascade presents Bio-Floss Replacement Poly Fiber Floss Pads for Cascade 700 & 1000 Canister Aquarium Filters. This 6-Pack of Cascade Bio-Floss Poly Fiber Floss Pads is specially designed for Cascade 700 & 1000 Canister Filters, allowing for simple and easy media replenishment. Don’t worry about cutting to size, these pads fit directly into media trays within these Cascade Canister Filters. Essential Mechanical Filtration: Bio-Floss helps clear up discolorations and reduce foul odors by physically trapping tiny particles of detritus, such as fish waste, uneaten food, or even decayed aquarium plant materials. This assists with establishing and maintaining healthy, crystal-clear water within your tank. Measurements: Package of 6 Pads – 5.75” (L) x 3” (W) x 8” (H) Individual Pad – 6.5” (L) x 4.75” (w) x 1” (H)