Okay, because it's summer I've been a little lax about testing my spa water daily, but I didn't expect this!
7/3/16
Temp 103°
Bromine 6.625
pH 8.2
CH 400
TA 50
7/23/16 (today)
Temp 100° (that's ok, I turned it down last week)
Bromine 18
pH 6.8
CH 0 (the test water didn't change color at all...