Salifert test help

[Nascars]

I'm trying learn how to test my magnesium. I did a magnesium test just now to understand this better. The black pistion is on the thrid line past 0,2. So how do i know what it is. Because the syringe has 0,1 0,2 0,3 0,4 and on not 0.00 0.00 0.02 and on like the chart shows.

[Bill S]

The syringe holds 1.0mm. The chart should go from 0.00 to 1.00, to match your syringe.

[Texreefer]

each mark is .01, so if it is exactly between .1 and .2 then you have .15.. and so on