[Compatibility]Rplacement filters & pre-filter sponges set, perfectly for 84oz/2, blue and grey automated cat water fountain. [ Triple Filtration System]Cat water fountain filters consist of 3 layer filtration system, high density cotton non-woven materials can fliter hairs and residue, preserve water clean; Activated carbon can get rid of chlorine and odor, purify and freshen water; Ion substitute resin can filter heavy metals and upgrade the taste, can maintain water clean, brand new and fascinating all day, and reduce the chance of urinary tract infections. [Pre-Filter Sponges ]High density pre-filter sponge around the pump, can larger filter impurities, preventing them from moving into water pump, it'll help enlarge the pump life. [Replace Filter Regularly]Suggest replacing the clear out every 2 to four weeks and update the sponge every four to eight weeks; Please alternative it more often if have a number of pets. [Warm Tips]Before replacing the filter, please soak the filter in water for two mins after which rinse it very well under operating water, which will stop carbon dirt from laying off into water, maintain water clean. Filters for 84oz/2 Pet Fountain Colour:As Shown Material:Polyester Package Contents: 8*Replacement Filters 8*Pre-filter Sponges Only the above equipment content, diverse merchandise usually are not included. Note: Light reflection and diverse exhibits could cause the color of the article within the photograph considerably various from the genuine thing. The length allowed error is +/- 1-3cm.