In my last garden I built two ponds,one rigid and one a liner. In this garden I have room for only one which will be above ground with plenty of support built up around it. I have been looking at Flexi-Pond Preformed Ponds. Does anyone have experience of this type of pond?
Then the preformed ponds are fine + a lot less work to install. I have a 3000 gallon pond in my garden (Koi Carp) + a preformed one for ornamental purposes. Good luck with your project.