This has been ranted on before but it's fresh in my mind.
Decided to test PO4 again tonight (why oh why do I even bother).
The very same sample vial: Readings of 36, 56, 22, 52.
Clean vials, no air bubbles, no spill reagent, no undissolved reagent.
There has just GOT to be a better way to test for this.
I think the checker is really just a random number generator.
