Santa was good to me this year. I got a Precision Marine RFCa4 calcium reactor, dual gauge solenoid, and a Pinpoint pH controller this Christmas. I was looking over the instruction manual and the reactor itself and I can't seem to find anywhere to place the probe for the pH controller. I can't even find in the literature where it suggests to even use a pH controller. I'm well aware of what all the equipment does, and why I would need a pH controller, but I simply can't find a place on the reactor to put the pH controller's probe.