Zero CYA

[crispyjim]

This thread is old, but I thought I'd update it anyway.

I did go ahead with adding CYA to the pool in doses. Since 7/2 I have four readings and I recorded either 45 or 50 each time. I've consistently kept the FC between 3 and 5 ppm. CC has been <0.5 ppm. My TA has always been high (well water) but my last reading on 7/11 was 260 ppm. Direct from the well, the water has a pH < 7.0 and TA of 475.
Just for completeness, last nights readings were
pH 8+ (had a fountain running last weekend for about 10 hours and a heavy bather load)
FC 3 (added another 1.4 gal of 6% should raise it to 5.8)
CC <0.5

The pool is clear with no sign of algae. I'm using 6% bleach as my chlorine source.
I've been adding muriatic acid to bring down the pH.
I guess I'm just going to continue to dose with acid to control it.

Now, I do actually have a question. What is PF and how is it calculated? I've seen it mentioned but I have yet to find an explanation anywhere. To me, it always meant Pool Forum.

Thanks,
Jim

[aylad]

PF means pool factor--it's a number the Pool doc uses to help estimate chemical amounts. He'll be along shortly, I'm sure, to tell you how he calculates it--I don't remember--I just use the bleachcalc program when I have to calculate amounts.

Glad your pool is doing so well, hope you're having time to enjoy it this summer!

Janet

[crispyjim]

Thanks.
The Grandchildren love it.
I can't use it as much as I'd like (recent corneal transplant), but it sure helps beat the heat we've been having this summer.

Jim

[Watermom]

Thanks.
The Grandchildren love it.
I can't use it as much as I'd like (recent corneal transplant), but it sure helps beat the heat we've been having this summer.

Jim

I know exactly what you mean about the heat this summer. Having my pool was about the only thing that made it bearable when we lost our power for 7 full days and 100+ degree temps after that big storm (called a derecho) came through about 2 weeks ago.

Have fun!