Can shocking damage the pool surface?

[avish222]

I need to shock my pool since combined chlorine level is too high.
I have been adviced to replace the water and not shock the pool since at high levels chlorine might attack the pool material and damage it.
I own an Intex above the gound metal frame pool and my shock level is 13ppm.
Is this a true risk?
Thanks,
Avi.

 

[PoolGuyNJ]

No, not normally.

Scott

 

[duraleigh]

Absolutely not. That's why we teach testing and dosing carefully. 13ppm is fine..........200ppm will likely damage your pool.

Did you consult the FC/CYA chart (in Pool School) to get that 13ppm?

 

[avish222]

Thanks for the quick reply.
I got the 13ppm from the pool calculator based on my CYA level.
It said 13ppm for shock and 19ppm for mustard algae shock.
Should I use the chart or the pool calculator is also good?
Avi.

 

[duraleigh]

Either is fine. There is some variance but not enough to make any difference.

 

[Richard320]

What they said, with one caveat: If you use granular chlorine instead of bleach, don't just throw it in and let it sit on the bottom to dissolve. Unless you like polka dots.