I'm thouroughly frustrated with my pool. Let me ask several questions and see if I can start to control my pool instaed of my pool controlling me. I'm reliant on going to pool stores because I have a cheap test kit. 1)What test kit can I order today to meet my testing needs so I never have to go to a pool store to have water tested. Next thing, I've been battling a copper reading of 1. for 10 days. I do not have a heater or use algacide. I've only had to add some alkalinity up and a little PH up last week. I've added 6 liters of metal free Sequestriant, but pool stores keep test stripping it and saying copper reading is still 1.0. 2)Would this test still show a 1.0 copper reading even if its been sequestered? Pool is minimully cloudy with a tint of green but a light green. Its 16 by 32 aproximatly 20,000 gallons in a vinyl liner pool. My current readings today show PH 7.4, Alkalinity 120, Stabilizer 0, FC 0 and TC 0. The low chlorine readings because of a vitamin C treatment 4 days ago. 3) I was told I couldnt shock for a week because of the vitamin C treatment, should I continue to wait? 4) Should I immediately add Stabilizer and how much? One of the pool stores always tests for nitrates first thing. They say Im high with nitrates and should shock every 4 hrs until I start get a reading of chlorine to know I burnt off the nitrates but am leary to due to copper readings. Are nitrates an immediate concern? For the last 3 or 4 years I would maybe add 1 liter of metal free and treat each week with it, but this year I'm afraid to do anything more due to the 6 liters of metal free already added. Where do I start??