When you're calculating this, is it:
A - The stated size of the pool (ie 18' X 52")
B - The actual water level (ie 18' X measuring tape from the bottom of the pool to the top of the water actually shows 47.5")
C - Use the stupid manual that came with the Intex that has a gallon ration at 90% that shows 6900 gallons
Trying to setup and use the pool calculator, and there's about 1000 ga difference between the manual and the actual size of the pool (18' X 52"). That might be a huge difference between getting it right and things going horribly wrong... ugghhh...