Replacement Filter For Drinking Fountains For Cats And Dogs 10 Pieces, OrganicReplacement Filter For Drinking Fountains For Cats And Dogs 10 Pieces, OrganicAbout this article. This article fits your. Enter your model. to make sure this article fits. Keep your pet healthy: Replace the pet fountain filter cartridge every 2 to 3 weeks. Make sure your pet drinks fresh water. Easy to use Before use, rinse the filter with water, put the raised side up and the flat side down, and just mount it on the fountain. Three Layer Filtration System Our pet water fountain filters use premium natural cotton mesh, coconut activated carbon, and lon exchange resin. Size Compatible with 2.4L pet fountain filter. Size: 13.7 x 13.7 x 1 cm and the diameter of the center circle is 3.8 cm. Compatible Water fountain filters only compatible with cat / dog drinking fountains.