is anyone using this test? if so are you having a hard time deciding when you hit the end point? it goes from purple to a purple blue real quick. plus the end color on the card doesn't look close to the color at all. I keep getting the same reading and I'm dosing the KZ K balance every day. I find it hard to believe my potassium is low. let me know if I'm the only one with these issues. I watched the youtube video on the test and it doesn't really help.

