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OP said he bought them awhile back not BRS sold old stock.It's new old stock. Send them an email with a picture and request an RMA.
I don't see why you should pay for the shipping back to them.
They might tell you to keep it and they will just send you a new box, in which case you can then open it and see if its giving reading within reason.
I was correcting myself as you were replying.OP said he bought them awhile back not BRS sold old stock.
I experienced the ULR pO4 reagents and they were off and inaccurate 1-2 months prior to the expiration. Probably the same boat with alk if I would guess.I bought 2 alk reagents a while ago from BRS. I just went to open my last box and the exp is 8/2020. Is it really expired or can I trust test results?
I had the same experience last month with Hanna Alk Reagents that would expire on 09/2020.I experienced the ULR pO4 reagents and they were off and inaccurate 1-2 months prior to the expiration. Probably the same boat with alk if I would guess.