This is the replacement controller unit for the Red Sea ReefATO+ system. As the central processing component, this controller is responsible for accurately monitoring your aquarium's water level and activating the top-off pump to maintain a stable salinity, which is crucial for the health of a reef environment. It serves as the direct replacement for the original controller included with your complete ReefATO+ kit.

Designed as a standalone replacement part, this controller ensures you can get your automated top-off system running again without purchasing an entirely new kit. It connects to the system's sensors and pump, executing the precise logic Red Sea is known for, including safety features to prevent overflows and pump run-dry situations. This is the controller only, part number R35620, and does not include the sensors, pump, or tubing.

This product is intended specifically for aquarists who already own a Red Sea ReefATO+ system and have a malfunctioning or damaged controller. It provides a cost-effective solution for repairing a vital piece of aquarium automation, allowing hobbyists to restore the stability and convenience of their ATO without the expense of a full system replacement.