Well, I got my ph calibration solution, but, like a booger-eating moron, I hadn't read the instructions for the meter yet. Somehow I forgot it was a push button calibration meter, and needed 4.0 and 6.8. The GH solutions are 4 and 7.
I was only able to do a single point cal, as it didn't like the 7.0. Not sure if it's a big deal, or not, but it made a 0.5 adjustment to the meter. It had been reading high. After comparing it side by side with the liquid test kit, I believe it is now accurate. I sorta made my own test solution, in a solo cup, using a sample from the res, and adjusting it to 6, 6.5, and then 7, by adding tap water. Pretty clear color change in the liquid kit at each step, agreeing with the meter along the way.
I wish there was a 100% way to be sure a pen was properly calibrated, but after all these years, I still eye them suspiciously.
By adding straight RO to the res, I am down to 575ppm, and things still look ok. I will change the res tomorrow, and hold my breath that the pen and drops agree. I would think that since I have been adjusting PH too low, I would have locked out cal and mag, and seen a problem by now?
Who knows. I will shoot for 5.8, and see what happens!
Regards, Kyle
!
! Gonna be cool to see your baby grow up
