This device is actually 2 dosers in one unit. It will enable you to automate the daily additions of both components of B-Ionic Calcium Buffer (BICB), utilizing the simple principle of air pressure displacing the liquid additives into your system. To power the doser, the purchaser will need to supply 2 lamp timers, 2 air pumps, and 2 check valves. The air pumps must have a minimum pressure output of 4 P.S.I.