Well - the reagent is expired by 6 months, but I took my water and the test kit up to Jaime at the store yesterday- I tested one of their tanks and it worked fine ( 165 ppm = 9.2 DKH). Jaime tested my water with his store kit and got the same ALK number on my tank water I did. So, unless their test kit is bad as well - I would say I have an issue and I am a bit "peeved" that the new Salt = Red Sea Blue bucket is testing at 12.2 DKH. I have new Hanna ALK reagent on its way - be here today by 8 pm according to the shipping email tracker. If that also tests my tank water and the new Red Sea water as high ALK- then I will take water it to Elmer's or somebodies house and get it tested again to see if the Hanna checker is bad.