Looking at the calculator (PoolMath) and putting the numbers at 10,000 gallon pool......present no chlorine but wanting it to be 4 ppm.... calc says to get that I could use 6.9 oz. of cal hypo at 73% in volume. Now does that mean I could take a gallon of water and mix 6.9 oz. and pour it in and that would do that? Thank You Dave G.