Compatibility : Compatible with all types of Hicuper 2.1GAL/8L/270oz large dog water fountain. Advanced Filtration : Equipped with coconut activated carbon filter, this keeps debris from contaminating the water and filters out any pet hair or food particles. Regular Replacement : We recommend replacing the carbon filter every 2 weeks and the sponge every 2 months to keep the water fresh. Note : Before turning on the dog fountain, soak the filter in a clean bowl (not the water tank) for 5 minutes. The filter must be fully soaked. Value Package : With the 8 pack filter & 2 pack sponge foam filters, you're set for a long time. Compatibility : Compatible with all types of Hicuper 2.1GAL/8L/270oz large dog water fountain. Advanced Filtration : Equipped with coconut activated carbon filter, this keeps debris from contaminating the water and filters out any pet hair or food particles. Regular Replacement : We recommend replacing the carbon filter every 2 weeks and the sponge every 2 months to keep the water fresh. Note : Before turning on the dog fountain, soak the filter in a clean bowl (not the water tank) for 5 minutes. The filter must be fully soaked. Color: White Material: Filter Sponge Package Contents: 8 pack filter 2 pack sponge foam filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.