I understand your interest in a such a pool. But I seriously doubt that there is any less maintenance on a "natural pool" than a more conventional pool kept clean with chemicals. I've got some friends that did the cool pond thing in their back yard. Just to look at, mind you, not to swim in. They loved building it, and the first few weeks, had all of us over to admire it. Then, as the summer wore on, they found out how much maintenance it REALLY was! They were always checking the ph levels and a bunch of other things. Cleaning filters, replacing pumps, the list was endless! The gave it up in the fall and vowed, never again!
