Ok, so I have been told by one pool guy that my pool is about 14,500 gallons. Another told me he thought it is around 18,000 gallons. But I just took some measurements and averaged everything and came up with 11,800 gallons. It is a free form pool, so that adds to the challenge. Below is a pic of the pool and my sketch with measurements (the x's are depth measurements). What do y'all think? I'm dealing with a pretty wide range here.