has a touch tank and it is more of a tank of death. Nothing lasts for more than a few months for a variety of reasons.
I think some of the bumps in the road would be keeping flow that doesn't ripple the surface but provides current everywhere. The other issue (and maybe the largest) is contamination. I suspect lotions, soaps, snot (kids right
), and other things would constantly be getting into the water. I suppose a rigid "cleansing" regimen before the kids went to the tank could maybe avoid some of these problems.
How big would she want it? I've tinkered with the idea of having similar on a sun porch one day and wouldn't mind observing your ideas.