Found the bleach calculator.. Typed in all of the info and it told me I need to add 16.7L of bleach to raise my ppm by 11 from 4 to reach 15. My pool is around 24,000 gallons which is about 90,850L. So that would be 3 of the jugs I got from Walmart. This thread might have some comments before this gets posted so I'm waiting until later tonight to do this so I can see what you guys think. The water does look a lot better from the 5 galllons of 12% yesterday but still cloudy. Maybe it just needs a little more time but I still would like to shock it to make sure.