that's good to know the cheaper ones aren't accurate. i was figuring it was the salifert because I got two bad ones from them
. Even the one habib sent to me that had the reference was bad! when i tested it with their own reference solution it read one dkh high sigh................ you are definitely one of the lucky ones if you got a good alk kit from salifert lately. Someday i might go back to salifert if they get their ducks in a row, but after two bad alk kits and a bad mag kit I'm taking a break.