When we are designing a spa/hot tub to be used with a pool we encourage our clients to build it separate from the pool. This is for several reasons, first it’s easier to be able to keep open all year (I prefer using mine in winter). We can build them closer to the residence for easy winter access. When you attach a hot tub/ spa to the pool and run it into the pool it becomes the same temperature as pool (I like my spa hot and most of my clients do as well). Some of the best results we have had is when our clients purchase an out of the box type Jacuzzi and we build it into the landscape with stone and plants.