Smart ATO Lite Automatic Aquarium Water Top-Off System

Maintain a stable water level in your aquarium effortlessly with the AUTOAQUA Smart ATO Lite. Designed for nano and medium-sized aquariums, this compact automatic top-off system continuously monitors water levels and automatically replenishes evaporated water, helping maintain a healthier aquatic environment with minimal maintenance.

The advanced dual optical sensor combines water level detection and fail-safe protection in a single compact unit. Powered by AUTOAQUA’s Quick Security Technology (QST), the system continuously monitors operation, providing real-time protection against overfilling, pump failures and empty water reservoirs.

Its magnetic mounting system allows quick installation without complicated adjustments, while the compact sensor design blends neatly into most aquarium setups. With no moving float switches, the Smart ATO Lite offers reliable long-term performance and reduced maintenance.

Supplied as a complete installation kit, the Smart ATO Lite includes everything required to automate freshwater or marine aquarium top-offs, making it an ideal upgrade for reef keepers and aquarium enthusiasts seeking greater stability and convenience.

Key Features

• Automatic aquarium water top-off system
• Designed for nano and medium-sized aquariums
• Automatically replaces evaporated water
• Advanced dual optical sensor with integrated fail-safe protection
• AUTOAQUA Quick Security Technology (QST) for real-time monitoring
• LED status and alert indicator
• Compact sensor with magnetic mounting system
• No moving float switches for improved reliability
• Helps maintain stable water levels
• Suitable for freshwater and marine aquariums
• Complete installation kit included
• Power input: 100–240V AC, 50–60Hz
• DC refill pump power: 4.5W (12V DC)
• Maximum pump head: 250 cm (8.2 ft)
• Maximum flow rate: 280 L/h (74 GPH)
• Maximum mounting thickness: 12.7 mm (½”)
• Flexible tubing size: 6.5 mm ID / 9.0 mm OD
• Tubing length: 200 cm
• Sensor-to-controller cable length: 120 cm
• Power adapter cable length: 180 cm

Package Includes

• 1 × AUTOAQUA Smart ATO Lite Controller
• 1 × Dual Optical Sensor
• 1 × DC Refill Pump
• 1 × Power Adapter
• 1 × Universal Tube Holder
• 1 × Siphon Break
• 1 × 200 cm Flexible Tubing
• Installation Accessories