FZONE Aquarium ATO Auto Top Off Dual Sensor Reef Freshwater Green Blue

Automatic Water-Level Control for Freshwater & Reef Tanks

Maintain a more consistent aquarium water level with the FZONE Auto Top-Off System. Dual optical sensors monitor evaporation and activate the included refill pump when additional water is needed.

Available Colors: Green and Blue. Select your preferred color before adding the system to your cart.

Key Benefits

• Dual Optical Sensors: Monitor high and low water levels for precise automatic refilling.
• Three-Layer Control Technology: EFTT, AFT and QST 2.0 help manage fill time, reduce unnecessary pump cycling and detect potential operating issues.
• Automatic Safety Shutoff: Stops the pump and provides a visual alert when abnormal filling, an empty reservoir or a malfunction is detected.
• Compact Installation: The slim sensor fits many rimmed, rimless, nano, medium and sump aquarium setups.
• Freshwater & Saltwater Use: Helps replace water lost through evaporation in freshwater, marine and reef aquariums.

What’s Included

ATO controller, DC refill pump, universal tube holder, water check valve, power adapter, 6.5-foot PU tubing and user manual.

Product Details

• Colors: Green or Blue
• Pump flow rate: Up to 74 GPH (approximately 270–280 LPH)
• Maximum pump lift: 6.56 feet (2 meters)
• Power: AC 100–240V input; DC 12V/1A output
• Magnetic mounting supports aquarium walls up to 0.78 inch (20 mm) thick

Important: Follow the included setup and calibration instructions carefully. Position the refill tube above the aquarium’s maximum water level and install the check valve in the correct direction to reduce backflow and siphoning risk. Regularly inspect and clean the sensors, pump and tubing. No automatic top-off system eliminates the need for routine aquarium monitoring.

Choose Green or Blue and make daily aquarium water-level maintenance easier.

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