RH calculation

[Giuseppe82]

Dear,
is it possible add in our Apex calculation nd diagram of RH?
Many thank!!

[iamchadster]

What is RH? Humidity?

[Giuseppe82]

RH is the comparation between ORP and pH, the calculation is:
rH = ((ORP + 200) / 30) + (2 * pH)

[iamchadster]

There is not a way to automatically do this. Out of curiosity though, how do you use this value? It seems to me that if it were to change in some way, you would have to drill down a bit into the values that go into the calculation to know what was going on anyway.

[Giuseppe82]

This value is more interesting than ORP because is the comparation between ORP and pH and temperature. It will be interesting only to can see directly the value and graph but I not need any kind of alarm or warnig.

[RussM]

rH is relative hydrogen. Randy Holmes-Farley has written about it in one of his old Reefkeeping articles about ORP. I have seen the topic come up on rare occasion in various forums, but it never has seemed to catch on among hobbyists.