How To Take Contacts Out Without Pinching

Oct 04,  · If you find that the chlorine level is already 1 ppm and you prefer it higher, you will need to add ounces per gallon to raise the level by 1 ppm. How Much Liquid Chlorine Needed For The general and ideal measure of the pool water balance against chlorine is always expected to be between the range of 1 to 3 Parts Per Million.