IceCap Auto Top Off ATO

  • $181.99
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Replenish Evaporated Water... with Confidence!

The IceCap ATO is a reliable dual optical sensor Auto Top Off management system that monitors and automates refilling evaporated water. Includes everything needed to install and operate.

Safely Keep Water & Salinity Levels Stable
An Auto Top Off (ATO) system is notably one of the most important pieces of equipment for a saltwater aquarium and simply a must have for any reef keeper. The IceCap ATO monitors and replenishes evaporated water eliminating the daily task of adding water manually just to keep your aquariums water stable.

The IceCap ATO is a well thought out automated system with a fail-safe design that uses two (2) optical sensors to monitor the fluid level of your aquarium or sump. The second optical sensor provides real-time protection against failure of the first sensor. Best of all, it is very easy to install and contains no moving parts that can fail.

The IceCap ATO also alerts you when your top off reservoir gets dangerously low to prevent the water pump from running dry. A bright LED indicator will allow you to visually see the status of your IceCap ATO as well as any possible issues.

Plug and Play
You simply move the magnet optical sensor base to the desired water level within your sump or aquarium. It’s that easy!

Mounts to Most Clear, Tinted or Painted Surfaces - Max wall thickness: 1/2 inch (12.7mm)

Everything Included!
Everything provided for installation and operation.


  • ATO Controller
  • 2x Optical Sensors
  • Power Adapter
  • DC Brushless Pump
  • 6.5` of Water Tubing
  • Tubing Holder
  • Will work in complete darkness!
  • Easy to install magnet mount sensor base
  • Dual optical sensor design for added safety
  • No moving parts to fail
  • Integrated fail-safe protection
  • Compact design
  • Manual top off function
  • Plug and play
  • Detachable components
  • Equipped with DC feed pump
  • Brushless DC Feed Pump
  • Max Head: 6ft
  • Max. Flow rate: 74GPH
  • Power: 4.5W@DC 12V
  • Pump cord length: 5.5ft
  • Power cord length: 5.5ft
  • Pump tubing size: Inner diameter: 6.5mm, outside diameter: 8mm Length: 6.5ft
    Note: It is possible to change to the other PUMP or solenoid valve directly(< 10W@12VDC output)