ATO2 AT Series is a set of components of automatic top off cooperating with  Aquarium Dispenser Doser AT1 Plus (all versions) and ITI Aquaristic Computer.

The set enables to control water level and permanent replacement of evaporating water in the tank. This sets includes two independent float sensors equipped with regulated holders which enable to define desired water level. One of the sensors is used to switch on refilling pump. The second sensor an emergency unit and prevents pump from running in situation of not working or blocking activating sensor.

The set is recommended to systems without technical tank (sump).

What’s included:

  • Activating water level sensor
  • Emergency water level sensor
  • Regulated level sensor holder x2
  • DC pump
  • Silicone tube: 1,5m
  • Silicone tube holder


  • Length of combined sensor cable: 200cm
  • Range of sensor holders regulation: (0-13cm counting from the edge of glass to lower float)
  • DC pump:12V (float rate max 280l/h, max head 2m, cable length 200cm, dimensions 40x40x30mm)

Manufacturer’s warranty: 24 months from date of purchase.