OK so pH -
Well once you have set up the Temp everything starts to fall into place like a jigsaw really, setting pH up is no different you are just dealing with different values.
So here we have the pH screen
Just as the temperature control page, you have nominal value current value and hys'. As with the temp input there are plenty of other funky add ons to play with if you wished here, for example nocturnal mode etc, this is important only if you really do not like natures ability to lower pH at night, I personally let the tank follow a rythm.
So what can pH be used for? In my case its just monitoring, of course I can set an alarm to wake me at 2am if it drops too low, or goes to high if my Alk dosing got stuck on, or if running a kalk stirrer etc. But the main purpose in reef tanks for pH control other than just monitoring the tank is calcium reactor control.
So to set up a ca reactor Co2 solenoid (I do not have this on my tank as I cast that old pony out long ago
)
First set up your nominal value in a ca reactor it should be around 6.2 to 6.5 depending on your media. The Hys' can be set to 0.1 in this case, we are controlling a solenoid so does not have so many issues with being switched on and off often.
Now go back to the socket function screen and decide what socket you wish the solenoid to be plugged into, lets say socket 2 for now.
Just as you did with the temp socket set up, select the socket to be edited and set as follows
pH - downward
thats it you are set, of course you can name the socket Co2 control or Freds Diner what ever you choose
If you want to control a Kalk stirrer you can do the same but opposite, if the pH drops you want the kalk to be turned on so set to pH up.
Next Salinity control - Oh thats a scary one