[NEED TO KNOW] PETKIT FILTER 3.0 is designed for PETKIT EVERSWEET 1 and 2 fountains. If you have EVERSWEET WATER FOUNTAIN 1, please remember to purchase NEW TRAY together. FILTER 2.0 is only compatible with NEW TRAY and FOUNTAIN 1.0. English version is not guaranteed [Stronger Filtering]PETKIT filter3.0 uses the filter material of purolite company as raw material, and increases the amount of filter material in the filter element, so that the filtration performance is better, and the harmful substances such as hair, debris and heavy metals in the water are better filtered. Your pet is protected from disease. [4 Types of Filtering]The filter layer is composed of: two layers of high-quality cotton mesh, coconut shell activated carbon and ion exchange resin. [Please Note] Before replacing the filter element, soak it in cold water for 5 minutes to activate the ion exchange resin. After replacing the filter element, press and hold the black reset button at the bottom of the dispenser to