Cant hold chlorine

[herrmanncr]

Wife took sample to pool store cause I can't be there to test. Here are results:
FC - 10
TC - 10
CC - 0
CH - 268
PH - 7.3
ALK - 113
CYA - 65
SAT Index - .10

They want to swim so I said add 1gal, wait 1hr and swim. I'll test and treat when I get home.

[aylad]

Those numbers look fine to me--I would swim in it with no problem. Great job!

Janet

[herrmanncr]

All you guys. Will test when I get home and adjust as needed and post #'s. Thanks!

[herrmanncr]

Think I need to shock to 20 or just maintain 5-10 FC as long as no CC and CYA stays down?

[aylad]

As long as no FC is holding steady, CC stays down and no chlorine loss overnight, then keeping it at normal ranges should be fine. Normal range is determined by your CYA, so here's the guideline...
Stabilizer . . . . . . Min. FC . . . . Max FC . . . 'Shock' FC
=> 0 ppm . . . . . . . 1 ppm . . . . . 3 ppm . . . . 10 ppm
=> 10 - 20 ppm . . . . 2 ppm . . . . . 5 ppm . . . . 12 ppm
=> 30 - 50 ppm . . . . 3 ppm . . . . . 6 ppm . . . . 15 ppm
=> 60 - 90 ppm . . . . 5 ppm . . . . . 10 ppm . . .. 20 ppm
=> 100 - 200 ppm . . . 8 ppm . . . . . 15 ppm . . .. 25 ppm

So if your CYA is 65, then 5-10 will be fine--just don't let it get below 5. If the CYA is 100 or greater, then keep it between 8-15 ppm.

If you see CC starting to go up (greater than 0.5 and not dissipated by sun) or the pool starting to look hazy, then shock it again.
Janet