AQUANEAT Aquarium Activated Carbon Filter Media Pad for Fish Tank Pond Canister Filter (10.5" x 36") Item Description Activated carbon impregnated filter pad effectively traps large particles, removes discoloration, odor, pollutants, and harmful chemical to keep your aquarium crystal clear DIY Cut-to-fit filter pad, good to use in freshwater and saltwater aquariums Works with all filters: canister, hang-on filter, wet/dry, pond filters, DIY filters To ensure optimum performance, replace the filter pad every three to four weeks depending on waste load of the fish tank Includes: 1 pack of filter pad. Each is of 3/8" to 1/2" thick ,thickness measured dry before packing and varies by batch Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return within 7 to 21 days from delivery date but product should be in original position and not in damaged condition,the return shipping charges will be buyer responsibility