Using Hanna Calcium Checker 

I use a 10ml syringe and draw 9ml + 1ml Reagent A I am yet to get a reliable measurement in 30 tests and have resorted to a titration kit.

thank you for your video. so much clearer than the hanna instruction card

Just a side note, I was advised today by Hanna Rep to use 9 ml instead of 10 ml. Our RODI water may have enough contaminants to alter the test slightly. I'm going to invest the products he is using in this video.

Great directions. Better than Hanna! 2 thumbs up!

great video!

Nice!! 👏👏👏