Can't maintain free chlorine

[CarlD]

What shock chart?
Adding amounts of chlorine according to your volume and current FC level is approximate. but you should add three gallons of 12.5%, not 2.5

[Rickc1]

I may be done. I will check in the morning to make sure haven't lost more than 1 in chlorine. Combined chlorine is 0. Thx

[Rickc1]

This is the link for the chart http://www.troublefreepool.com/conte...art-slam-shock. Last nigh FC was 20. This a.m. was 18 so guess not done. I just want to make sure I am getting FC to correct level (ie the 20 vs 28). Thx