XP Aqua Duetto 2 Dual-Sensor ATO Aquarium Auto-Top-Off System - XP Aqua $139.99 With huge features jammed in a tiny package, the Duetto2 is the perfect ATO for your aquarium. XPAqua’s proprietary dual-optical sensor packs two precise level sensors in one incredibly... Add to Cart
XP Aqua RO/DI Flood Guardian - RODI Auto Shut Off Solinoid (AKA The Marriage Saver) - XP Aqua $69.99 Prevent floods by adding the super-easy-to-install Flood Guardian to your RO or RO/DI System. Never worry about forgetting to turn off your RO/DI system or overfilling your reservoir again! Simply... Add to Cart
XP Aqua Ultimate 4-Sensor ATO Aquarium Auto-Top-Off System - XP Aqua $169.99 With 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... Add to Cart
XP Aqua V2 Complete ATO & Surface Skimmer for Sumpless Aquariums - XP Aqua $149.99 Sumpless 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... Add to Cart