Tunze osmolator

[bigmatt]

What is the difference between the 3155 and the nano besides the controller and the laser level? Looking to replace my current jbj ato

 

[rvitko]

The 3152 can only work on a set up smaller than 55 gallons, since we only put a float switch on it, its safety is a timer and after 3 minutes of continuous running (1.8 out of the box but can be set to 3) it turns off the pump for good until you unplug and plug it back in. This limits it to adding no more than 2/3rds of a gallon. The 3155 has an optic sensor, the float is a back up and a 10 minute timer as a back up, since the pump is run at a higher speed in 10 minutes it can add just shy of 3 gallons. You will need the 3155 for a 180.