AutoAqua Smart ATO Nano G2

AutoAqua Smart ATO Nano G2

Overview

The AutoAqua Smart ATO Nano G2 is a compact, fully automatic top-off system designed specifically for nano and small aquariums. Using an optical sensor for precise water-level detection, it keeps your tank or sump topped off with RO/DI water, helping to maintain stable salinity and water parameters with minimal effort.

With built-in safety features and an ultra-small footprint, the Smart ATO Nano G2 is ideal for AIO tanks, nano reefs, and smaller freshwater setups where space is limited but reliability is critical.

Product Specifications

• Product Type: Automatic top-off (ATO) system

• Model: Smart ATO Nano G2

• Recommended Tank Size: Nano and small aquariums (typically up to ~50 gallons, depending on evap rate and setup)

• Sensor Type: Optical water level sensor (no moving floats)

• Pump:

  • Compact DC top-off pump included

  • Designed for use with RO/DI water

• Mounting:

  • Magnet-mounted sensor for easy installation and adjustment

  • Suitable for rimless and many rimmed tank/sump edges

• Power: Low-voltage DC for safe, efficient operation

• Use Environment: Freshwater and saltwater compatible

Key Features

• All-in-one nano ATO with integrated optical sensor and pump

• Helps maintain stable water level and salinity automatically

• Ultra-compact design perfect for nano tanks and tight sump spaces

• Easy magnetic mounting—no drilling or complicated brackets

• Built-in safety timers and protections to prevent overfilling

• Simple setup: connect sensor, pump, and reservoir, then plug in and go