Neogeo,
The Arizona pool is the one beside the creek. The one in the picture above on this web site. The water there comes out of the ground just above this pool from the rock formation just under the sand.
And yes, the Serenity pool gets most of it's water from the Crab Cooker pool. The water from the Womb pool spills into it when necessary.
The hot water also comes from the under the sand in the creek in many places. Maybe you just never looked before ! But it always has as far as I can remember.
I hope that makes it clear :~)
If a tree falls in the forest and no one sees or hears it then - did the tree really fall ?