A lovely pond indeed however I live in the UK so I will have to source my pipes elsware plus my pond is round so I will have to re think the pipework a little .
Many thanx againfor the idea .
Dave
Another option is to heat-bend PVC pipe into a circle. Any propane-driven torch, such as we use here to burn weeds, will easily heat small-diameter pipe for bending. The only problem that I'e found with doing it is scorching the pipe. If I were to do a round one, I'd make a form and bend around that a little at a time: anchor one end, heat a 3' section, bend into place, heat the next 3' section, etc. I've done it with 2" PVC pipe successfully.
Bob