I'm looking at redoing the duck pool (I currently have 4 cayugas and 1 white layer hybrid as well as 4 neighborhood ducks that play and visit) because the liner I used has been shredded and is leaking. I'm looking at building the frame out of OSB and sealing it with a fiberglass DIY kit. My question is does anyone have any experience with this? As of now the pool I want to build is going to be 4ft x 11ft with a shallow end at 1 foot and a slope down to 2 ft so they can dive and swim some (the hybrid is lame in both feet, best guess she had a bad niacin deficiency when she was little) and a small architectural waterfall. Thanks for your input everyone!