Hi All,
We have a 2 year old 15k gallon gunnite pool. Personal circumstances required that we use a pool maintenance company for the past 5 months. We were able to cancel our service last week and return to the TFP way. I'm stumped about our chlorine level. The pool company was sanitizing with pucks (yeah, i know) and reported weekly chlorine levels between 4 to 6. I just tested the water myself using our Taylor FAS-DPD 870/871 reagents. I was "shocked" to see FAC consistently at 19. I tried testing with an OTO kit and saw an ugly shade of orange. That seemed to validate the FAS-DPD results. I turned down the auto-chlorinator to 1 and retested after one week. I saw the same results. I brought a sample to Leslie's and they measured an FAC/TAC of 6. I figured my reagents went bad. That's unfortunate since I last bought 1 pt bottle of 871 and a 1/4 lb of 870. So, I order a fresh TF-100 kit. I retested this AM and I measure FAC at 21! Can anyone offer any insight?
FYI, I noticed this post by jblizzle:
Can these chlorine measurements really be right? - Page 2
I searched online but cannot find out if Leslies' uses a DPD or FAS-DPD measurement.
Here is the complete list of Leslie's results (1/17):
FAC - 6
TAC - 6
CH - 250
CYA - 120 (argh. had this down to 35 before pool company and pucks)
TA - 70
pH - 7.4
Cu - 0
Fe - 0
TDS - 0
Pho - 1000
Here are the last readings from the pool company (12/28):
Chlorine - 4
pH - 7.4
TA < 80 (they added Alkalinity Plus)
We have a 2 year old 15k gallon gunnite pool. Personal circumstances required that we use a pool maintenance company for the past 5 months. We were able to cancel our service last week and return to the TFP way. I'm stumped about our chlorine level. The pool company was sanitizing with pucks (yeah, i know) and reported weekly chlorine levels between 4 to 6. I just tested the water myself using our Taylor FAS-DPD 870/871 reagents. I was "shocked" to see FAC consistently at 19. I tried testing with an OTO kit and saw an ugly shade of orange. That seemed to validate the FAS-DPD results. I turned down the auto-chlorinator to 1 and retested after one week. I saw the same results. I brought a sample to Leslie's and they measured an FAC/TAC of 6. I figured my reagents went bad. That's unfortunate since I last bought 1 pt bottle of 871 and a 1/4 lb of 870. So, I order a fresh TF-100 kit. I retested this AM and I measure FAC at 21! Can anyone offer any insight?
FYI, I noticed this post by jblizzle:
Can these chlorine measurements really be right? - Page 2
I searched online but cannot find out if Leslies' uses a DPD or FAS-DPD measurement.
Here is the complete list of Leslie's results (1/17):
FAC - 6
TAC - 6
CH - 250
CYA - 120 (argh. had this down to 35 before pool company and pucks)
TA - 70
pH - 7.4
Cu - 0
Fe - 0
TDS - 0
Pho - 1000
Here are the last readings from the pool company (12/28):
Chlorine - 4
pH - 7.4
TA < 80 (they added Alkalinity Plus)