hanna ulr phoshate

Hanna ULR Phosphate Checker- This was a free gift from BRS during their Black Friday giveaways. I already have one. I was planning on eventually selling or trading it. Then I thought to myself, what would Jesus do…so I’m giving it away. (Unless this gets removed, because someone is now offended)...

Hanna Checkers for Sale - Like New Condition. Alkalinity, ULR Phosphorous, and Nitrate. All three work perfectly.

I just ran 3 tests in a row on my Hanna ULR Phosphate and had 3 different results. (Between .09 2nd test and 3rd I decided to put in a new battery just for heck of it btw) .18ppm .09ppm .21ppm Has anyone else ran a couple to few tests in a row w/ different ranges outside the margin of error...