I never noticed an alk checker issue. What happened? I know the calcium one sucks - it's terrible. The alk and PO4 ones are really awesome though. The alk fluid if it gets old will wander in accuracy, but that's the same for any type of titration test. Recently Hanna recalled a whole whack of alk reagents, but i have 2 of the recalled ones and they test exactly the same as the replacement one, so I just carry on using them. :lol: Since alk is so important though, I always double test - once with Hanna and once with Salifert. Salifert is consistently 0.2 dKH higher than the Hanna.
That's what I was talking about. The recall and issues with the reagent. I'll look into it.
I got my refund from DD. Looks like I'm ordering from LA now since DD doesn't have anymore listed.
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