[Member No. 1]

Originally Posted by DivingTheWorld

I find this to be the easiest to generate my code:

https://www.reeftronics.net/adpg/dosingcalc.php

For one minute every other hour, this should work:

Fallback OFF
OSC 000:00/000:60/119:00 Then ON

Just for clarification...

If you enter that as typed, Apex will accept the update, but will convert it to:
OSC 000:00/001:00/119:00