I am often surprised with the number of pools I see while flying around that look similar to the top picture, I've also seen a couple of them that have been filled with dirt and made a garden out of. Without punching a couple of equalizing holes in the bottom of that pool it would have already been pushed out of the ground by the water table around these parts, I've seen that happen before.
That pool and surrounding area has a lot of potential Craig, have you considered switching over to a salt system at all?