The pool had algae when I opened it in last week of May. After 2 weeks, it turned blue and cloudy. Testing water with the pool company almost daily, I noticed even after putting shock, free chlorine level was always around 0. They recommended to not add any shock and apply phosphate and wait for 48 hours. Sad part I have now green pool with Algae. I got the TF-100 kit and tested water yesterday.
Here was the reading
CC = 1
I added 6 Gallons(10%) of liquid chlorine from walmart yesterday evening , waited for few hours and read the FC = 0.5
Added another 6 more Gallons by night and checked after an hour and FC = 3
This morning I checked again and the FC was 1.25
I added another 12 Gallon of Liquid chlorine and it now shows FC=3.0 .
Pump is running 24/7 since opened the pool.