【Top Fin Compatible Filter Cartridge】This filter cartridge is suitable for Top Fin filter and perfectly matches Top Fin Silenstream Power Filters PF10.The specific dimensions of the filter element are 5.5 in L x 3.1 in W inches.With this aquarium filter cartridge, you can always maintain healthy water quality.【Excellent Filtration Performance】After many scientific tests, the high-quality cotton and activated carbon contained in this filter Cartridges can filter and absorb harmful bacteria and debris from fish and plants, and its filtration performance is three times that of other brands, more Effectively keep water clear and healthy, thus protecting your fish and other creatures.【Replace Filter Element in 2-4 Weeks】Research shows that after 2-4 weeks of filtration and absorption, the filter cotton will fully absorb and filter the impurities in the aquarium. For the health of your fish and other creatures, you will need to change your aquarium filter cartridge every 2-4 weeks to keep your water source healthy and clean.【Quick Installation】Installing the Top Fin filter cartridge can be completed quickly, the whole installation process does not take more than five minutes, just take out the old filter cartridge and replace the new filter cartridge, don't worry about affecting your fish and other creatures. (Note: Please be sure to rinse the filter cartridge before use)【Satisfied After-Sales Service】We always maintain a strict quality control process to ensure the filtration capacity of this filter cartridge, as well as the perfect compatibility with Top Fin filters. If you have any questions, you can contact us at any time, we will try our best to give you a satisfactory answer as soon as possible and help you solve the problem, don't worry. Product Description About AMZBD Our products come directly from the factory, reducing middlemen.Mainly engaged in aquarium products, including aquarium lights and filter cotton.The products are available in multiple sizes for buyers to choose freelyand giving you a high-quality and low-cost experience.More important, our cartridge has 3 times activated carbon than the leading brands.And we increase density of the cartridge for better absorbing of the sundrie in the water.If you are not satisfied after receiving the product,please feel free to let us know, we will give you a satisfactory resolution. Filter Cartridge Replacement Instructions: Remove aquarium cover.Using the cartridge tab, pull straight up to remove the used filter cartridge. Dispose of properly.Rinse new filter cartridge under room-temperature water to remove any dust.Place a new filter cartridge into the filter by aligning the key slot.Gently press the filter cartridge into place. Scope Of Application REFILL FOR TOP FIN SILENSTREAM PF10 POWER FILTERS Double Layer Cotton Aquarium filter takes high-quality filter cotton , High-density fiber with plastic frame to help ensure even distribution of carbon , comprehensive the filtering effect , purify the water quality and extend the water change time. Activated Carbon Aqueon filter cartridges small adopts high-tech activated carbon , which can filter and absorb harmful bacterial impurities to fish and plants , helps create crystal-clear & healthy water for raise fish. NOTE: when you buy replacement filter cartridge, please make sure its compatibility with the Top Fin models and Tank size.If you have any questions, You can find us anytime, we will give you a satisfactory answer as soon as possible to help you solve the problem, don't worry.