On Sat, 16 Nov 2019 14:48:05 +0000
Recliner wrote:
https://www.flickr.com/photos/reclin...-friend/lightb
ox/
I wonder why the water tunnels are so deep. You'd think when pumping water
around you'd want them to be as shallow as possible since water is heavy stuff
and requires huge amounts of energy to pump back uphill.