Auto Top Off Refill System Pro - Aqua Medic

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Auto Top Off Refill System Pro - Aqua Medic

50% Recommend this to a friend (1 of 2)

SKU: 210590
In Stock: 70
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Quick Overview

ATO systems are very important on saltwater aquariums and can give you more success, and time to enjoy your tank. Aquamedic's Auto Top Off System Pro is a well thought out, plug and play design that incorporates every aspect of a safe and reliable ATO system.

  • Water resistant controller

  • Optical water level sensors

  • Backup level sensor

  • Empty reservoir sensor

  • Dry-run protection

  • Audible and visible alarms

  • Low voltage


Full Details

Owners Manual


ATO systems are easily one of the most important pieces of equipment on a saltwater aquarium. By keeping your tanks water level steady you will also benefit from a constant salinity, not to mention the daily task of adding water to the aquarium or sump will be removed.

Aqua Medic's Auto Top Off System Pro is a well thought out, fail-safe design that uses multiple sensors to monitor the fluid level of your aquarium, and also warns you when your top off reservoir is getting low. The ATO Pro utilizes an optical sensor as the main level sensor to continuously monitor the water level and has a backup sensor that goes above the optical sensor. The entire ATO system will shut the system down if water ever gets too high and triggers the backup sensor.



Sensor Cord Length - 6ft

Controller Dimensions - 4" L x 5" W x 1" H

Max Head Height - 10 ft

ATO Pump Voltage - 12V

Wall Voltage - 120 VAC


What's Included?

ATO Pro Controller

ATO Pump

Fill Tube - 6 ft

Fill Tube Bracket

Optical Sensor

Backup Sensor

Float Sensor

Power Supply

Sensor Brackets and Screws


2 Items

  • Unreliable By James on 9/7/2017

    I'm currently on my 2nd unit. From the beginning the first unit would randomly stop working. Would take a bit of fidgeting to get it to work again. First it wouldn't fill the reservoir then when it started running it wouldn't stop until the water reached the little black emergency shut off box. I contacted AquaMedicwho responded quickly. I contacted them a day or so later to let them know the unit had started working again. A couple of weeks later I contacted them again to let them know the issues had started again. A week goes by with no response. I contacted again and was told they contacted the manuf in Germany and that it takes a while to get a response. Two weeks or so goes by and a package appears at my door. The new unit worked perfectly for about a month and started randomly stopping to work. I discovered if I use a turkey baster and spray the sensor with water it will eventually start working. So far over the last two weeks it's stopped working 3 or 4 times.
  • Excellent Product and Excellent Customer Service By Kevin on 3/16/2017

    This is an excellent product with not only the optical and back up sensor for the sump area, but also includes the float sensor for the ato receptacle. On top of that, the customer service at AquaMedic is excellent. I highly recommend this product for anyone.


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Product Questions

Hi! I was just wondering if this ATO could be mounted in a display tank, as I have no sump at the moment. The attachments for the sensors seem to be very far down in the pictures.
Question by: Henry on Jan 24, 2017 5:10:00 AM
Great question! The sensor is adjustable and can be flipped upside down to be higher in the water column. Putting an ATO in the display can be done, but the surface agitation could cause constant fluctuations of your ATO pump turning off and on. :-)
Answer by: Randy (Admin) on Jan 28, 2017 7:24:00 AM
What is minimum water depth in sump required for this system
Question by: Chris on Jun 3, 2017 5:27:00 AM
The optical sensor simply needs to make contact with the water, so there really is not set water depth required. The water level sensor has about 3' of adjustment on the bracket, with the minimum height from rim at about 6", and the maximum at about extension at about 9". The maximum extension would be with one of the mounting screws removed, but we found the bracket to still be sufficiently secure with just 1 screw in this position.

Happy reefing!
Answer by: Zack (Admin) on Jun 9, 2017 11:32:00 AM