I have been following TFP since last August. Took control of my pool and couldn't be happier. Thanks to all here that contribute your knowledge and experience.
So this spring I decided to drain and refill my pool due to the sky-high CYA built up by the pool guy over the years. At that time I also learned that the fill water here in LV is about 300-350 CH. So here's the question.....
I tested my brother's pool with Taylor K-2006 the other night. He converted to SWG recently. His numbers are below:
FC:3
CC:0
Ph:7.6
TA:140
CYA:40
CH:125
Since I expected the CH to be a minimum of 350 (he hasn't drained pool and has owned the home for 18 months) I used the 10ml sample size to conserve reagent. I was shocked when the BLUE endpoint was reached with the 5th drop. Unlike with my pool, it did not proceed through a purple-like color for a few drops (blue with tiny red flakes) on the way to blue. It was clear BLUE with 5 drops of R-0012. We both scratched our heads but then attributed the low CH to the recent salt conversion (with water softening in mind). After reading some more here and also getting a better understanding of the ion exchange that takes place in the softener, I am now stumped as to the very low CH reading as the salt should not have lowered CH (at least from what I think I understand).
Educate me! How can his pool test 125 CH with fill water of 300-350 and insane evaporation here in LV. My pool tested about 1000 CH before the drain I performed a few weeks ago (and that was 3 years after previous drain).
So this spring I decided to drain and refill my pool due to the sky-high CYA built up by the pool guy over the years. At that time I also learned that the fill water here in LV is about 300-350 CH. So here's the question.....
I tested my brother's pool with Taylor K-2006 the other night. He converted to SWG recently. His numbers are below:
FC:3
CC:0
Ph:7.6
TA:140
CYA:40
CH:125
Since I expected the CH to be a minimum of 350 (he hasn't drained pool and has owned the home for 18 months) I used the 10ml sample size to conserve reagent. I was shocked when the BLUE endpoint was reached with the 5th drop. Unlike with my pool, it did not proceed through a purple-like color for a few drops (blue with tiny red flakes) on the way to blue. It was clear BLUE with 5 drops of R-0012. We both scratched our heads but then attributed the low CH to the recent salt conversion (with water softening in mind). After reading some more here and also getting a better understanding of the ion exchange that takes place in the softener, I am now stumped as to the very low CH reading as the salt should not have lowered CH (at least from what I think I understand).
Educate me! How can his pool test 125 CH with fill water of 300-350 and insane evaporation here in LV. My pool tested about 1000 CH before the drain I performed a few weeks ago (and that was 3 years after previous drain).
I'll take a feel of the walls as well.
