Originally posted by bobad:
Pumping air is cheaper and more efficient than pumping water. Solarbee units lift water
Hmmmm... aeration benefits aside, I have trouble imagining that air bubbles can circulate water as efficiently as direct water pumping. (watt for watt, of course.) Am I wrong? Probably so!
I had no idea there was a commercial solar powered circulation pump on the market. I was planning to build my own. There is no end to the things I have learned here over the years.There's a lot less energy lifting water with air as air naturally rises through the water column vs. forcing it up (which is what you do when pumping). However there is a limit as to how high you can lift water with air above the natural water level, but sinces it's not necessary with diffusers it's irrelavant.