Recent content by rbkl

Can you use the Pool Calculator in reverse, that is, if you know all your pool values except CYA and a known shock level has no effect, can you say where the CYA is generally?

Okay. I did drain the pool 60%. After reading your advice, I decided that I would refill the pool prior to treatment. It was late last night when I went outside and saw that pool with just that bit of water and thought again how little liquid chlorine it would take to get to a shock rate...

I live in San Diego and the pool is on top of a hill. I do not know where the water table is, but it is no where near the pool and is not a factor in the draining. The pool has not been drained in the 12 years that I have lived here, nor had it been drained by the previous owner who lived here...

My cya is at 100 and the pool is as thick with green as pea soup. I am in the process of draining 60 percent of the water to reduce the cya to 40. Soon I will have a 9600 gallon pool of pea soup instead of the original 24,000 gallon. At that point, I cannot use the filter. Should I shock the...