Replacement filter pads for Dog H2O & Cat H2O, includes 3 months worth of filter pads, each filter pad includes sponge activated carbon, recommend to change monthly.
Filtered & fresh water encourages your pet to drink more water & stay well hydrated & healthy. Rinse the Filter Pad to remove excess carbon dust before using. Never place the Filter Pad into a dishwasher.
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Overall happy with the quality of the water filter.