Clear, but no chlorine???

[mary jo]

It rained last night, so hubby is going in the pool this morning (after playing tennis). I'll suggest he rinse off beforehand.

OK- BigDave- I must admit when you mentioned experimenting with 2 scoops of DPD my first thought was: hmm, you are testing for possible user error, which, given my # of rookie mistakes I'd say makes sense… but it turns out i DID get different results.

Yesterday's testing (8-28) The pool's numbers @ opening: FC=29 CC=2.5 Brushed the pool.

I ran FC/CC tests @ 4:00pm, 10ml sample, added my standard "1 heaping scoop" (because heaping is my standard), and got: FC= 25. CC=3.0

Same test w/ 2 scoops: FC=27. CC= 2.5
Then I tried 3 scoops: FC=31. CC=2
THEN I tried 1/2 scoop: sample "flashed" pink and then went clear again.

Hmmm- added a jug of bleach to the pool and waited several hours.....

Yesterday evening @ 8:30pm I tested using 1 and 2 scoops to see what would happen:
1 scoop: FC =30. CC=3.0
2 scoops: FC=32. CC=2.5
Did 2 scoops again: FC=32. CC= 2.5

This morning- tested @ 7am:
1 scoop FC=30 CC=2.5
2 scoops FC=32 CC=2

what's going on- or am I just an erratic tester?

also: just tested TA and pH: pH off the chart (but you mentioned this would happen w/ high FC), but
TA went from green to blue to pale yellow (after 14 drops). ???