Fzone ATO Auto Top Off Refilling System (360P)

If there is one automated accessory we suggest, it is a Fzone Auto Top Off (ATO) System. When a Freshwater & Saltwater Aquarium evaporates water, the salt & minerals are left behind increasing the salinity and TDS. Maintaining a constant water level in your aquarium or sump can lead to much healthier livestock, coral, plants and even better performance for your protein skimmers and other equipment. The Fzone Auto Top Off System includes a controller that connects a sensor & the pump to transfer the water from a reservoir to your aquarium. The sensors in your aquarium will be able to sense the water level and when it drops low enough, the pump will turn on, pumping fresh water into your aquarium until the desired water level is reached. The Fzone ATO system includes three sensors keeping the water level constant & your mind at ease.

• Compact & Space-efficient: The ATO system is ultra-compact (0.7 inches), fitting rimmed, rimless, and sump tanks for stable water level maintenance across tank types.
• QST Real-time Protection: Monitors water levels, triggers top-offs when needed, and stops the pump if refilling exceeds 6x calculated time, preventing overfilling, dry runs, and malfunctions.
• Safe & Reliable: Features <1mm dual optical sensors, EFTT for size adjustment, AFT to prevent unnecessary pump activation, and QST 2.0 for immediate alerts and pump shutoff.