Tonights readings:
6:30 pm
fcl 2.5
tcl 2.5
ccl 0

7:30
fcl 7.5
tcl 7.5
ccl 0

8:30
fcl 10
tcl 10
ccl 0

9:30
fcl 15
tcl 15
ccl 0

Most of these tests I performed 2 times to double check
No combined chlorine in any of the checks!
So what now?