Pool Math computes the amount of liquid chlorine (or bleach) in ounces that need to be added to your pool to bring it up to your desired level.
In order to do this you must first supply:
1) Your pool size - "My pool size is 20,000 gallons" 2) Your desired chlorine level - "I want my chlorine to be 8" 3) The percentage concentration of the chlorine you will use to make the adjustment - "I will be using 10% chlorine"
Once these values are entered, you can supply your current chlorine level and be told how many ounces of chlorine to add to get your desired outcome.
"My chlorine level is 4." => "Add 99 ounces of chlorine, to bring 4 up to 8, using a chlorine concentration of 10%"