That's because you're younger and have better eyes than me my friend. I have a problem with color chips (color blind) so havnig a digital readout works for me.
I have an API kit now. I'll post a photo when I get home so you can tell me if I have 0 or the first scale up cause I can't tell the difference.
That's why I like the Salifert tests for Ca
so much. They have a sharp color change.
BTW, I pre-ordered one of these. If they get enough from Hanna I might have it for the weekend as I can pick it up nearby.