Why Choose Sumpless ATO2? The XPAqua Sumpless ATO2 is the first and only automatic top-off (ATO) system specifically designed for aquariums without sumps. It combines an overflow box for surface skimming with a dual-optical sensor ATO to maintain stable water levels while keeping your aquarium water crystal clear. Key Features ? Designed for Aquariums Without Sumps ? The first ATO specifically engineered for sumpless tanks. ? Dual-Function Overflow Box ? Acts as a surface skimmer to remove oily biofilm while doubling as a media reactor. ? Magnetic Mounting for Easy Installation ? Securely attaches to any aquarium up to oe inch (12.7mm) thick. ? Dual-Optical Sensor Technology ? Ensures accurate water level detection and prevents overfilling with QST (Quick Security Technology) programming. ? Customizable Media Chamber ? Allows you to run carbon, GFO, or other media to improve water clarity. ? Powerful Efficient ATO Pump ? Provides a strong 74 GPH (280 LPH) flow rate with a max head of 8.2 feet (250 cm). ? Plug-and-Play Setup ? No complicated programming required, making installation quick and easy. ? Includes Free Filter Media ? Comes with a 90mL AquaFX Clear Blaster Nano Filter Media (older inventory may include a carbon bag sample). ? Carbon Sponge Included ? Further enhances water clarity and filtration efficiency. Specifications Power Adapter Input: 100-240 VAC, 50-60 Hz Cable Length: 6 feet (180 cm) ATO DC Pump Max Head: 8.2 feet (250 cm) Flow Rate: 74 GPH (280 LPH) Power Consumption: 4.8W @ 12V DC Cable Length: 6 feet (180 cm) Flexi Overflow Box Dimensions: 3.94? x 2.17? x 6.30? (100 mm x 55 mm x 160 mm) Max Volume of Media Chamber: 3.74? x 1.99? x 1.97? (95 mm x 50.5 mm x 50 mm) Mounting Thickness: Up to oe inch (12.7 mm) Sensor Controller Max Mounting Thickness (Sensor): oe inch (12.7 mm) Cable Length (Sensor to Controller): 6 feet (180 cm) Included Accessories ? AquaFX Clear Blaster Nano Filter Media (90mL sample) (Older inventory may include a carbon bag sample) ? Carbon Sponge (for enhanced water filtration) Why Sumpless ATO2? ? The Ultimate ATO for Tanks Without Sumps ? Provides both auto top-off and surface skimming in a single unit. ? Improves Water Clarity ? Removes oily surface film and enhances filtration with media options. ? Prevents Overfilling Maintains Stable Water Levels ? Dual-sensor technology ensures accurate water replenishment. ? Simple Quick Installation ? Comes with everything needed for a hassle-free setup. Would you like installation guidance, compatibility details, or troubleshooting tips? ?