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Ultimate 4-Sensor ATO Aquarium Auto-Top-Off System - XP Aqua
XP Aqua$169.99With 2 X dual-optical sensors, the Ultimate ATO is the first ATO to include 4 sensors. The 4 sensors allow us to design a dual-stage overfill alarm that is less intrusive as well as a run-dry protection feature that prevents your sump from running dry:... -
V2 Complete ATO & Surface Skimmer for Sumpless Aquariums - XP Aqua
XP Aqua$149.99Sumpless ATO is the first and only ATO designed specifically for aquariums without sumps. The combination of the sleek overflow box and the innovative dual-optical sensor ATO will help to keep your aquarium topped off and your water crystal clear...