💦Aquarium Filter Cartridge: You will get 6 aquarium filter cartridges measuring 6.1 x 4.6 inches, they are designed to be compatible with EZ-Change brand No. 2 aquarium filters, and for 10-20 power filters. There are sufficient quantities to meet your replacement needs..💦Efficient Activated Carbon: Each filter cartridge for EZ-Change #2 contains a lot of high-quality activated carbon, which can effectively absorb fine impurities in the water, remove odors, and provide fresh water for the fish in the aquarium..💦Multiple Functions: The exterior of the replacement power filter cartridges uses thickened filter spray cotton, which is tighter and thicker, and can filter out impurities, dust and garbage from the water during repeated use, making the water more pure..💦Replace It Regularly: The fish tank filters fits EZ-Change #2 filter cartridge, which will affect the filtering effect if used for too long, so we recommend replacing it every 2-4 weeks. Of course, this also depends on your specific actual situation..💦Simple to Use: First you need to make sure your filter is a 10-20 gallon aquarium filter and not a 30-60 gallon filter. Simply shake and rinse the aquarium filter replacement for EZ-Change #2 aquarium filter and insert it in its place.