Quote:
Originally Posted by edwmax
Thanks. I built a small one about 25 years ago using 1 1/4 TW PVC ... 9 ft wide by 20ft long. The hoops were 20 ft. Actually that frame is still standing.
I've never seen double hoop frames before, that's interesting.
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I will post the pictures later, but I will tell you now. I used the double hoops so I could keep a air gap between my two layers of plastic. I thought the insulation factor would increase. With the double layers, and 790 gallons of 65f fishpond water, I should sail right through winter.
