Testing Time

[mohawk]

Ok, so if time doesn't matter-lets see if I have this right. If my cya is 30 I should never drop below 3ppm and stay between 3 and 6. Am I understanding this correctly? And shock?-why if I'm in those parameters?

[duraleigh]

Yep, you've got it. 3-6ppm is not an ABSOLUTE range but rather a guide to keep you in a nice range. Below three is probably not a good idea for any length of time.

Shock when you suspect water problems. Google "breakpoint chlorination" or "superchlorination" to better understand why and when you shock.