Apex pH calibration weird problem

[ReefRondo]

Hi guys,

Just went to calibrate my pH probe on my frag system and have discovered a weird issue and wondered if anybody else has noticed this? So I have the pH 10 reference solutions but in the drop-down menu within the calibrate pH probe task, there is only pH 4 or 7 reference solutions. Am I missing something? Please see below some photos. I do see it mentions low pH calibration solution. Do I just have the wrong solution?

 

[Staghorn]

That’s the low end 4 or 7. You should have 10 for the high end calibration

 

[ReefRondo]

Ok so having never done this before do I need either the 4 or 7 to start the process and the 10 later to fully calibrate?

 

[ReefRondo]

Thanks for your help Staghorn I do indeed need both solutions to calibrate. I will get some 7's ordered up now.