ph probe cal.

[mariobrothersleeve]

Does anyone use anything different than the test cal packets? Ph test is at 4.0 and 7.0. Wish one could just adjust it, but i guess this is how apex works.

 

[salt_for_brains]

I use buffer that our water lab keeps on hand. 7 is a constant but I use either 4 or 10 for the other. A two point calibration is more accurate because you are adjusting at two different ph values rather than a single point along a linear equation.

 

[fastrd400]

I didn't even calibrate my last new Ph probe.

 

[mariobrothersleeve]

I didn't even calibrate my last new Ph probe.

My probe reading is around 7.9 and my control is 8.2.