I want to build a pond on my deck and am wondering if anyone has any
ideas. I'm aiming for a 3' x 6' footprint, about 2.5' deep. I'm
considering building this out of thick glass, or galvanized & welded
steel, or a strong plywood frame with standard pond liner inside it.
The advantage of the homemade approach is I can make it to the exact
dimensions I want, and build in the landscaping around it (i.e., with
attached planter boxes as opposed to flower pots).

Has anyone out there built a pond above ground this size? Any ideas
for the design?
Many thanks...