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- Aug 21, 2015
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so ive been testing my hanna alk test kit to compare it with my trident results and they are way off so i decided to get a new bottle of the hanna reagent to compare it and the old bottle is reading 8.1 as opposed to the new bottle is reading 8.7 trident 8.68 old hanna expires sep 2021 new bottle dec 2022 is this normal?