BLBAISH 9 Packs Carbon Filter Cartridges for Tetra Whisper EX Filters, Replacement Filter Cartridges Large for Tetra, Fits Whisper EX30/EX45/EX70 Filters Item Description ?? PERFECT COMPATIBILITY- Design for Tetra Whisper EX Power Filters, our large filter cartridges are strong compatible with Tetra Whisper EX30,EX45 and EX70 Power Filters. Each box includes 9 packs replacement filter cartridges, good choice for you to replace the tetra filters cartridges! ?? ACTIVATED COCONUT CARBON FILTERS- Compared with other aquarium filter cartridges, our aquarium filter cartridges are dual-sided, featuring dense-floss with coconut carbon, which is more than 25% more active than other activated carbons. And its solid frame with grid which make the activated carbon evenly distributed, form layers of multi-density cartridges to remove odors and discoloration, keep your fish tank water crystal clear, polished and healthy. ?? EASY INSTALLATION- Simply rinse the replacement filter cartridge under cool water to remove carbon dust, easily install using the "FRONT" orientation tab to the cartridge carrier,and align the cartridge bottom key slot, insert the filter cartridge into the filter chamber, and make sure the large filter cartridge fits completely into the Tetra Whisper EX30/EX45/EX70 Power Filters. ?? OPTIMAL PERFORMACE- For optimal performance, please change approximately every 2-4 weeks. Failure to replace the aquarium filter cartridge for a long time will cause the aquarium water become turbid and smelly, making the fish live in an unclean and unhealthy environment. ?? 100% SATISFACTION- Our tetra whisper filter cartridges are always your best choice! We maintain a thorough quality control process to ensure compatibility with Tetra Whisper EX Power Filters models. If you have any questions, please feel free to contact us! 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