Free Shipping!
Home > Aquarium Supplies > Maintenance > AutoAqua Smart ATO Micro Automatic Top Off System
AutoAqua Smart ATO Micro Automatic Top Off System
AutoAqua Smart ATO Micro Automatic Top Off System
Additional sizes may be available!

Please Note: Return of electrical equipment for exchange or store credit is limited to 30 days from the date of purchase. Beyond 30 days, please contact the manufacturer for repair or replacement as covered by the manufacturer's warranty.

Returned products must be unopened and in the original packaging to receive full store credit. Products that have been opened, used, or lightly used, will incur a 15% processing fee. Upon receipt of the returned product, store credit will be applied, minus the processing fee.

Rewards Program


*Compact auto top-off system perfect for nano aquariums
*Replenishes aquarium water lost through evaporation
*Comes complete for quick and easy aquarium installation

Effortlessly maintain proper water level in nano, pico, or smaller all-in-one aquarium systems. AutoAqua Smart ATO Micro Automatic Top Off System provides the perfect solution for smaller aquariums prone to water loss due to evaporation. Miniature optical sensor detects lowered water levels and activates the refill pump to top off your aquarium automatically to the set desired level.

The AutoAqua Smart ATO Micro Automatic Top Off System is a unique auto top off system that monitors and automates refilling evaporated water. Compact unit allows quick, easy and discrete installation and contains no moving parts that can fail. Simply move the optical sensor to adjust the desired water level within your sump. It's that easy! Integrated QST (Quick Security Technology) provides real time failsafe protection.

Everything you need is included:
Controller with Optical Sensor, Power Adapter, DC Brushless Pump, 6-1/2 ft length of Tubing, and a Magnetic Mount Tubing Holder.


  • DC Feed Pump model: DP-200
  • Brushless (30,000hrs) - Head: 6.5ft (200 cm)
  • Flow rate: 74gph (280l/hr)
  • Power: 4.5W@DC 12V
  • Pump cord length: 5.5 ft
  • Power cord length: 5.5 ft
  • Pump tubing size: Inner diameter: 6.5mm, outside diameter: 8mm
  • Magnetically mounts to most clear, tinted or painted surfaces up to 1/2" thick
  • Will work in complete darkness

Note: It is possible to change to the other PUMP or solenoid valve directly (< 10W@12VDC output)


  1. Mount the Optical Level Sensor on the tank/sump.
  2. Plug the Siphon Breaker into the tubes. Keep it higher than the water level of the reservoir and set up the Water Tubing using the Magnetic Tube Holder.
  3. Connect both the DC Pump and Power Adapter to the Controller and then connect power.

Note: It is recommended to set up the Optical Level Sensor and Water Outlet in the same area and keep them at least 4" apart.

LED Indicator
LED Status Meaning
Blue LED Light On Power On
  Flashing Refilling/Pumping
Red LED* Flashing with audible alert 1. Water Empty
2. Bubble Noise

*Please check the tank/sump and then reset (unplug and re-plug power cable).

Quick Security Technology (QST)
The Smart ATO Micro uses QST for real-time protection against any failure situation. The controller will give an audible and visual alert when it senses any refilling sequence that is 3 times longer than the first refilling sequence. For example, if the first refilling time is ten seconds, it will alert when any other refilling time is over 30 seconds. Note: There is no security time control for the first refilling.

Customer Testimonials

No testimonials have been submitted for this product.

Would you like to submit a testimonial? Click here

Bookmark and Share