Help with aquaforest Calcium test kit

[aKlevans]

Hello
I am having trouble producing accurate results using the aquaforest calcium test kit.
Specifically, it is not specified what "blue" and "purple" are.
Also, the video on their youtube channel seems to be innacurate, as it skips one step.
Any help?

 

[dragon99]

Best I can tell its the same chemistry as the Salifert test kit. This video shows the color change (go to about 2:45):

 

[aKlevans]

Best I can tell its the same chemistry as the Salifert test kit. This video shows the color change (go to about 2:45):

thanks!

 

[domination2580]

I have had issues with this as well....the test vial it comes with is horribky off from what the test reads too.....so im questioning afs ability to keep things stable