Pool did not get touched for about 5 months. It is the worst grren swamp I have ever seen. I am brushing sides, running pump, and then vaccuming. My plan was to and Polyquat 60 1 gt and 3 bags of shock and let the pump run overnight. In the morning I plan to test and SLAM until clear. Does this sound like a good plan? Of course my other readings are all out of wack...should I do anything about them (pH- CYA) before SLAMMING? Readings this am Chlorine-0 pH- below 6.8, CYA -0 TA-5 Calcium- 125. Thank you for all the help.