Replacement filters for Tritone and Fiumi fountain : suitable for iPettie Tritone and Fiumi ceramic pet water dispensers. Replacement and cleaning: Clean the fountain, filter and foam filter once a week. The carbon filter is replaced every 2 weeks, and the foam filter is replaced every 4 weeks. Double filtration system: Carbon filter helps to purify water quality and improve taste. The foam filter blocks hair, dust or food debris and protects the pump. Health and safety: Made of cotton, activated carbon, environmentally friendly materials can protect the health of your pet. Note before use: Before replacement, please rinse the filter with clean water. It is best to store some filters that can be replaced in time. Colour:white Material:Activated carbon, cotton, plastic, foam Package Contents: 16 x activated carbon filters 4 x pre-filtered foam. Only the above package content, other products are not included. Note: Light shooting 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.