Shock?

[aylad]

You only really need to shock if the water starts to look dull or cloudy, or if you start losing chlorine overnight, or if your CC gets above 1.0. That being said, since I have a large kid population swimming in my pool, I also shock it after a few days of particularly heavy swim load (especially if the swimmers are young) or after any heavy thunderstorming, especially if it's hurricane-induced. Just a little added insurance to make sure it stays nice and blue

[mike_311]

thanks, so what level should i bring the chlorine up to when i shock it?

[Watermom]

Shock level (and also needed maintenance levels) of chlorine are based on your CYA levels, so for your pool, shock level would be between 12-15. Take a minute to read the Best Guess Chlorine Chart in Janet's signature above for more information about the correlation between the two.