Hi, new to the site but been reading alot, a wealth of info in here. I am planning to build a pool, but i think I would be more inclined to build a spool, I have attached a paintshop mockup. (the best I could do). My guess is this is about 6500 gallons. Is that too big for a spool? Any advice on a builder, equipment, (my Design) etc. is appreciated. Can I use/should I use a heat pump? n Gas and electric are available.