An external command receiving circuit receives an external command signal supplied from the exterior, in synchronization with one transition edge of a first clock signal. The pump, the nozzle and the inlet are controlled by the microcontroller, which is programmed to control the pump as a continuously variable power transmission for maintaining efficient motor operation, the nozzle for maintaining efficient pump operation, and the inlet for maintaining efficient recovery of the total dynamic head of the incoming water. The acid-reactive dental fillers are preferably nanostructured, for example, in the form of nanoparticles. The optical fiber is optically coupled to the planar waveguide. The fluid reservoir further includes a forcing member to exert a force on the membrane to pressurize a fluid in the storage volume.