Aquatic Life Barrel Buddie Smart Water Level Sensor Automatic Filler/Refiller Controller SystemThe Barrel Buddie will monitor the water level at both high and low points in your barrel or container. When the lower sensor detects the water level, the low voltage solenoid will open and allow water to flow into the container. When the water level reaches the upper sensor, the solenoid will close. Unlike float valves or auto top off systems, the Barrel Buddie reduces TDS creep by allowing the RO unit to only operate once to fill the container. This