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FWIW. I recently tried one of the Elos Alk test kits. It only measures in whole numbers so I doubled the water sample and then it took twice as many drops to change color, then, divided the number of drops by 2 (which gave me readings in .5's).
I still have one Salifert alk kit that I trust (out of 3) due to it's older dates, and it compares to a friend's Salifert kit (also with an old date). The Elos kit matches those Salifert kits.
The Salifert kit read 8.8dkh.
The Elos started to change at 17 drops (8.5dkh) and was fully changed at 18 drops (9.0dkh). 8.8 is right in the middle of that color change. So, at least for now, I am comfortable that I can trust the Elos Alk kit.
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Rick
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