- Jan 27, 2014
- 23
I'm curious to know if anyone has ever gotten a false positive on the FAS DPD test? I have bought 3 different pool test strips this year and none of the strips register any free chlorine in my pool. The FAS DPD test has consistently measured free chlorine. I'm doing the bucket test to see how much chlorine I would have to add in order to see a free chlorine results on the FAS DPD test because I do know that once enough is added it will show up on the strip. I've read some articles online that say that high combined chlorine can interfere with the DPD chemistry and show up as free chlorine. Any thoughts? My water has been dull all year. I closed the pool last year with extremely high CYA and opened to none. By the way I know that no one likes strips and the strips aren't expired either. I'm looking for someone with insight to this issue not a knee jerk reaction. Thanks.
drop test strip test
FC 5 0
CC 0 5
TA 240
CH 250
CYA 30
drop test strip test
FC 5 0
CC 0 5
TA 240
CH 250
CYA 30