Quote:
Originally Posted by Myka
That's exactly what I was getting at when I asked how you were calibrating.  I'm glad you found the issue.
Also, if your RO/DI isn't perfect, using it for the Hanna Calcium Checker will throw those numbers off too. I recommend using distilled water in the Calcium Checker. |
Finger prints on the vials can throw off the numbers too. I used to handle those vials using napkins
