The Neptune Systems ATK V2 Automatic Top-Off Kit is a complete and simple standalone solution designed to automatically replace water lost to evaporation in saltwater aquariums. Evaporation is a daily challenge for reef keepers, making an automatic top-off device one of the first pieces of automation many hobbyists acquire to maintain stable salinity and water levels. This essential device eliminates the constant chore of manual water replenishment.

Distinguished by its robust design, the ATK V2 features three layers of redundant monitoring and water-level control, safeguarding against common ATO failures that can lead to catastrophic aquarium issues or flooding. It includes a new, reliable PMUP pump with a 100 gph flow rate, a 14-foot lift, and a vertical 24V DC design optimized for water jugs. Further enhancing its reliability are two optical sensors with no moving parts, a mechanical float valve, and audible alarms. This plug-and-play system operates independently and does not require an Apex Controller, though advanced features are unlocked when paired.

This product is ideal for both new and experienced aquarium hobbyists seeking a highly reliable and worry-free automatic top-off solution. Its emphasis on safety and redundancy makes it perfect for those who prioritize protection against equipment malfunction and potential water damage to their home or business. With its ease of installation and operation, the ATK V2 offers invaluable peace of mind, ensuring stable aquarium parameters without daily manual intervention.