Aquanique Replacement Bulb for Model MF750UV/FUVFL The Replacement Bulb for Floating Fountain with UV Filter and Pump is a 5 watt replacement UV bulb used for aquanique's Floating Fountain with UV Filter and Pump (QFUVP). Cold cathode ultraviolet (UV) tube ensures longer bulb life. We recommend changing the UV bulb at least once a year for optimum performance.