Ok I need a refresher here, I need to make sure I am doing the math right here. To figure how many gallons in a pool isnt it....diameter x diameter x depth x 5.9 = gallons in pool? correct? So my 27' round pool would be ...27 x 27 x 4.5 x 5.9 = 19354.95. Got to add some stabilizer so I need to make sure I add the right amount...Thanks