How much salt do you add to a non salt water pool We do not have a true salt water system we have a chlorine pool but want to add salt can we do this and how?

40 lbs per 1000 gallons use pure water softener salt just pour it in the leave pump runing pool will start clearing up the first day salt will be gone over night . more is not better do not exceed this formula it will not speed up this process. i have been using this formula for ten years with no problems