I built a cover for the pond last year out of 2x4s and OSB. It filled it with Styrofoam and double layered (both sides of OSB) each side with plastic sheeting. It was successful in that all the fish survived. (The pond is too shallow to leave it uncovered). The problem is that this thing weighs over
200 pounds, blocks the light for the fish/heating and leeches formaldehyde. It also trapped water, despite the double sheeting. I went to lift it off this spring and couldn't figure out why it was so frickin heavy. It had about 30 gallons of water trapped inside the bottom layers of plastic. :)I was thinking I could build something out of those Paltuf polycarbonate panels.Although I have no idea how heavy these things are compared to the OSB? Also building the access door would be a PITA given the corrugated nature of these panels?
Does anyone have experience working with these polycarbonate panels? Any better ideas?