Originally Posted by Boondoggle
Thanks Snipe. I was hoping that I was going to go out and test and see my baseline with TX kind of match up with LaMotte as it's the kit I'll likely use going forward. I just flat don't understand the kit calling from purple and producing yellow or orange with a reading that is quite a bit off of what the university came in at. API looks closer on that part....maybe I'm using both kits for a bit.

Pay attention to EWEST's post above re: the pH swings during a 24 hour time period. Time of day that the sample is taken makes a difference in the pH reading. That could be what you are seeing.

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