Sounds like bad batch . Sorry to hearI am wondering if anyone has seen this? I am using the Hannah Alkalinity test kit. I get my refills from Bulk Reef supply.
My alkalinity runs 9.1. Saturday, I open a new refill and tested. The Hannah with the new refill tested at 8.1. So I pulled out the Salifert test and it tested at 9.2.
I also had some left over Hannah regent and tested again. It read 9.1
I am wondering if there are some bad batches of Hannah refills?
The lot number is 7529 Exp 12/2019