Even thou I just added a lb of CYA on Tuesday, I couldn't wait to try the test. I got a reading of 40. I am out of reagent 0871 as stated above and did my final FC/CC test until the replacements get here. My results below: 10ml tests
FC 15
CC 0.5/1 Hard to tell for sure last drops in bottle and they just flew out.
pH 7.4
CYA 40

Going to calculate the amt. of bleach to put in to reach shock level of 30 with a CYA reading of 30-50. I have a group coming over to swim on Sunday and would like this last little bit of algae killed and vacuumed up by then.

On Ben's best guess pool chart there are 2 shock levels...what is the difference? One is 'SHOCK' and the other is +SHOCK+