The XPAqua Sumpless ATO2 is a revolutionary automatic top-off system engineered specifically for saltwater aquariums without sumps. It diligently maintains a constant water level by replacing evaporated water, while simultaneously functioning as an effective surface skimmer to remove undesirable oily film and an integrated media reactor for various filtration media.

This innovative device features a proprietary dual-optical sensor for precise operation, incorporating a secondary failsafe and an intelligent, pre-programmed algorithm to prevent overfilling. Its new controller programming and circuitry enhance system protection, while the improved sensor design ensures longer durability. The unit boasts a convenient media chamber for carbon or GFO, easily mounts with a magnetic system, and includes an ATO DC pump with a head of 8.2 ft (250 cm). It is completely plug-and-play and operates effectively even in complete darkness.

Ideal for aquarists with sumpless setups, the Sumpless ATO2 provides an all-in-one solution for maintaining stable salinity and crystal-clear water. Its unique combination of precise water level control, surface skimming, and media filtration makes it an indispensable tool for simplifying maintenance and enhancing the overall health and aesthetics of your reef aquarium, eliminating the complexities often associated with traditional ATOs in sumpless environments.