Apex pH Probe

[Enigma]

I should really read instructions before hand.

I only picked up ph7 solution for calibrating my pH probe. The probe read the solution as being 7.01, which I think is okay. Then I tried to use the same solution as the high and low solutions for calibrating. That didn't work.

I figured since the probe was so close to reading the ph7 solution correctly that it would be trustworthy enough to use without actually being calibrated, so I popped it in my sump.

7.98

My API test always returns a value somewhere between 8.2 and 8.4.

Could it really be that out? should I even worry about this until I get the ph10 solution?