Yet another apex help thread

I'd stick it after the set statement. You'll also want to flip the "set" statement to off when you add the timer logic otherwise it won't turn off outside of those times. Additionally, I believe that defer command is going to apply to your timer trigger as well, so if you really want it to start at 10, you'll want the timer to be "21:30 to 10:00".

 

Honestly drop the defer line if you really don't care that your skimmer waits 30 minutes before it turns back on....or change it to 5 minutes or something smaller.

 

Yes.