Not sure how many of you use the hanna alk checkers. This is from a discussion on another site. Some Batches of reagent are bad and giving false readings. I checked both of my bottles that I got a few days ago and both are bad. Thinking this is the reason for my recent chemistry problems. I thought it was the new dosing pumps but apparently I was wrong. Here's a link to check your reagents.
HI755-26 Reagent Replacement Program
HI755-26 Reagent Replacement Program