Penn Plax Cascade 700 1000 GPH Floss Pads &ndash; Filter Pad Keeps Your Aquarium Clean and Clear &ndash; 6 Pack Convenient, no-fuss replacement pads for your Cascade 700 1000 canister filter. Includes 6 floss pads per pack. You will be amazed at the difference in the water quality in your aquarium. These pads trap particulate matter keeping your aquarium clean & clear. Replacing carbon and biological filters regularly can be costly. These floss pads help extend the life of your filters! Last 2-3 months when you are diligent about cleaning and maintaining them. You should easily be able to get a year supply out of 1 order. Perfectly cut to fit into the filter tray without any gaps. You will never have to worry about the water getting through the gaps and not being filtered.