XTA1210 Features: * Filter cartridge * For best results change bio bag monthly * Improved performance * Easy maintenance * Easy to use * Clear water made simple * Unique cartridge design: round modern design, continuous flush performance, improved biological filtration * Dense dual sided mesh catches debris and fish waste Options: * Available in several sizes Color/Finish: * Carbon absorbs odors and discoloration Dimensions: * Dimensions: 23.25" H x 11" W x 4" D