There is finally a professional grade product that automates refilling evaporated water. The All-New JBJ A.T.O. (Automatic Top Off) device is the most advanced water level controller system on the market. Lifting heavy buckets and spilling water is now a thing of the past. Maintaining stable salinity and specific gravity are no longer a problem since the A.T.O. will refill as soon as the water level drops. The JBJ A.T.O. will keep all salt levels at consistent parameters, ensuring an optimal environment for your tank inhabitants.