Whats To Much Bleach?

[jrv331]

First season using bleach, Im getting ready to shock my pool and based on the chart Im shooting for 10ppm. I have AG with Vinyl liner and want to know what is the safest level I can go to with out starting to damage the liner.

Thanks
John

[Bleach=Chlorine?]

Need to know the CYA (stabalizer) level in the water so the shock level can be estimated using Ben's Best Guess. Also, if you want specific quantities you will need to provide the approx size of pool (gallons).

[mwsmith2]

You'll be fine with 10 ppm. From what I remember, I think 15 ppm is the upper limit for vinyl liners.

Michael

[jrv331]

Im trying to find out at what level it starts to affect the liner, for example will going above a 20ppm level start to fade or damage the liner?
Thanks
John

[Bleach=Chlorine?]

John,
That depends on the level of CYA (cyanuric acid) because that stabalizes the chlorine but also starts to 'inhibit' its power. As pointed out by anohter member you should be safe to go to 15ppm in a vinyl-lined pool with normal CYA levels of 30-50.

Ben's Best Guess CYA Chart
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

[jrv331]

Thanks for the replies. My main concern was that Im using trichlor tabs and know they will also raise my CYA level causing me to need higher doses of bleach. Dont want to dump a bunch in and come back to a bleached out liner or worse.
Thanks
John

[Bleach=Chlorine?]

You should be fine because as the CYA increases it is protecting the chlorine more so that higher dosage is equivalent to a normal dosage with normal levels of CYA. You may want to use trichlor until you hit 30-50 on your CYA and then just add bleach as needed.