Quote Originally Posted by Montireef View Post
I tried this but found a problem: if pH equals setpoint nothing happens and after a while I get a Water1 alarm (because none of the sockets turn on). I need a way to set the condition: EQUAL
Maybe this:

G1 = Water1 AND pH-value 1 Increase
G2 = Water1 AND pH-value 1 Decrease
G3 = pH-value 1 Increase NOR pH1-value 1 Decrease
G4 = Water1 AND G3
G5 = G2 OR G4

I would use either G1 or G5 to top off depending on pH value.

Is there any other easier way?