Aqua-Tech EZ-Change Replacement Filter Cartridges for Clear Aquarium Water, 5-15 Power Filters,Blue Item Description About this item EZ-Change #1 Filter Cartridge fits AQUA-Tech 5-15 Power Filters Contains AQUA-Tech Premium Activated Carbon No messy assembly required Changes in seconds just shake and rinse For best results, change every 2-4 weeks Aqua-Tech makes aquarium maintenance simple and easy. Aqua-Tech EZ-Change Filter Cartridges are color coded for fast and easy selection. These cartridges contain Aqua-Tech premium Activated Carbon for maximum filtration and require no messy assembly ? simply change in seconds by shaking and rinsing. Use of Aqua-Tech Replacement Filter Cartridges in your Aqua-Tech Power Filtration provides Complete 3-Stage Filtration for overall, cleaner, healthier fish Complete 3 Stage Filtration System: In Stage 1: ? The filter cartridge floss screens out dirt and debris. ? Molded and ribbed back for maximum water-to-carbon contact. In Stage 2: ? Activated carbon inside filter cartridge removes odors, discolorations and impurities. ? Change the used Aqua-Tech replacement cartridge monthly as carbon deactivates with use. In Stage 3: ? The Bio-Tech Biological Grid*, which comes with your power filter, never needs replacing; ensures elimination of toxic ammonia and nitrite; and has a unique design that will not clog! *Aqua-Tech Bio-Tech Biological Grid sold separately 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