yeah, I checked the link.....FANTASTIC!!! Man this project of your has really got my gears turning!!! I would love to do something like this in my back yard but would like it to be a more year round thing.

I was thinking of turning a corner of my garage into the "equipment" room with a BIG sump also with a chiller and heater and then drill through the wall and plumb underground to a "tide pool" the place I am thinking would be between 2 trees so would be fairly shaded in the hottest part of the day. winter would be the kicker... it get DAAAMMM cold here in the winter would have to find a way to have a structure over the pool in the winter, but still get sunlight almost like a green house type of enclosure.
HHMMMMMM PLEASE KEEP US POSTED!!! This is fantastic!!!!!