I agree, and looking forward to this afternoon's numbers with both test kits.Only way to tell user error is to retest. I will retest if I get a number that does not make sense.
My Hanna and Salifert are typicaly within .2 of each other.
Lets see what tomorrows numbers are.
I wanted to just say again how grateful I am that you take the time to help me. My barebottom is so much cleaner now w/ the OW-25. What a difference!
I also noticed you use a lot of carbon. I own carbon but only use it on occasion, let me know when/if you wish for me to add it. I actually bought these tea bags on Amazon. I add two tablespoons and after 2 weeks just toss the bag. I like it better than rinsing out a mesh bag.