As you can see on the above graph, the ORP is the orange/goldish graph, while the pH is the reddish orange graph. I had the ORP connected to the Apex base unit for a while before my pH probe came in the mail and it was reading a reasonable number (300ish). As you can see, last night at 10pm or so I installed/calibrated my new pH probe, and immediately the ORP was reading incredibly high. Thoughts??