How does one measure the amount of Sodium Bromide (Bromide Reserve) in a hot tub? I see all the usual drop and strip tests for Bromine, but nothing yet for reserve Sodium Bromide. What I do see is when my Bromine levels are testing low and then I oxidize with MPS, the bromine measure increases - so it must be coming from a Bromide reserve. What I don't know is how much reserve is left before it is oxidized.
Thanks!
Thanks!