ATO Automatic Top Off System for Reef Tanks

Optical level sensor detects water drops as small as a few millimeters and triggers the top-off pump immediately to keep salinity stable
Prevents salinity creep in reef tanks by automatically replacing evaporated freshwater before it shifts your parameters
Dual safety shutoff stops the pump if it runs too long, protecting your tank from overflow and flooding
Compact controller fits in any sump cabinet, on a shelf, or mounts flat to the side of your aquarium stand
Works with any freshwater reservoir and any container you already have on hand

Stay in the loop.