For any newbs out there or anyone who has trouble testing their CYA check out the CYA Standard Solution at TFTestkits. For $8 you get a 50ppm solution that allows you to run the test and see exactly what that dot should look like at the end point.
It is a no brainer to add to your order when you are purchasing your first TF-100 or even just getting refills.
note: I have no affiliation with TFTestkits.
It is a no brainer to add to your order when you are purchasing your first TF-100 or even just getting refills.
note: I have no affiliation with TFTestkits.