Brian's underlay goes in
Buiding a frame.
The pond is about 15000 liters (4000 gallons) and 1.5 meters (5ft) deep at the lowest point. For this pond, we decided that a treated wood frame would make an ideal attachment point for the pond liner. On one side there was a lot of gravel so concrete footings were used to keep the 4x4 posts level and solid. 3ft rebar was pounded through the posts at 2ft intervals. Once the liner is in, cedar 2x6 boards will cover the liner and create a small overhang around the pond. There will also be a 4ft wide bridge spanning the center, to access the patio. There will be a bench that hangs over the pond in one corner. All pipes, electrical and other connections will be built inside the bench and hidden from view. This means that the liner doesn't need to be punctured for bulkhead fittings. The entire design also means that the liner can be removed or replaced fairly easily. Just remove the cedar trim and pull out the liner. We're working on a design for an in-pond skimmer that will also hi...
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