Charcoal Water Filters for PetSafe Drinkwell 360 Fountains, Pack of 10

Directions for use: Thoroughly rinse out filter with running water before inserting in to the fountain. Although completely harmless, doing this will cleanse the filter of any charcoal dust that may have become loose. Insert the filter in to your pet fountain. Filter positions will vary by the model of the fountain. The user guide included with your fountain will give specific instructions depending on the model of your fountain. It is recommended the filter be replaced every 2 to 4 week and more frequently if multiple pets are using the fountain.