Why "PT Ponds?"
Well, I've built ponds using a number of different methods and materials. Along the way, I developed some preferences. For me, I wanted to build a small water garden pond that looked nice, was relatively inexpensive, and easy to build. One that could potentially be knocked down and relocated sounded nice, and the "no digging required" was a real bonus!
I'd built a number of ponds using landscape timbers and pressure treated plywood, of varying sizes. This involved laying down a pair of timbers parallel to each other, then another pair on top, looking kind of like a # , only square. (The parallelogram was a look to be avoided!) Then you keep stacking them up, pinning the corners with spikes, or sometimes ready-bolt or rebar. Once that was done, Pressure treated ply was cut and dropped inside this frame, and a liner installed.
This didn't look bad, and could be dressed up by painting the side of the ply facing out with black, or some other color, and a cap rail added to the top.
Most of the time, these ponds were two feet above ground, but also extended two feet into the ground. I made several like this, about 7ft X 7 ft, with the volumes going from 900 gallons to 1,200 gallons, depending upon the filter system used. And I did experiment a lot with the filter systems! Pretty much all DIY "Do It Yourself."
But this time around, I wanted to do something else. I'd seen some close to what I wanted and then made some changes that suited me. Since I've made four of them, I can now build one in a day. If I decide to put one in for someone, I can "pre-fab" one here, taking my time and put it in the pick-up truck when done and set it up on-site, in a couple of hours.
But selling and installing ponds is NOT something I intend to do!
Although I'll not write off the possibility of building other types of ponds, I intend to explore the possibilities with this current design. Smaller, shallower ponds for individual waterlilies or lotus, larger ones for larger plants and/or goldfish, and maybe try an octagonal design, built along the same lines as my current line. Perhaps for Koi. . .
Pressure treated wood works well for me. After it has weathered for a while, it should take a waterproof stain nicely. Plywood that lined my early ponds was removed from the ground after about 10 years. That wood had been given a coat of black latex paint, nothing special, but the wood was still good. No sign of rot.
Still, since they've changed the chemistry of the pressure treating, it may not last as long. I don't know. I did see where some of the landscape timbers, particularly the ones in contact with the ground had developed some rot, some had been somewhat eaten up and colonized by large ants, some with termites. So, I decided that anytime I put the current design anywhere other than on a concrete pad, I will place it on a pad of concrete pavers. Should I decide I want more depth and go part way in the ground, I'll use a concrete footer under the above ground frame and painted pressure treated ply below ground.
If (when) I do that, I'll post something on the web site about how I do it, and how it works out.
I do think I'll move up to either a thicker version of the liner I used on the Patio Ponds, when I put one off the patio and on to a paver pad. Either that, or change back to Permalon. However, seeing that I do have a fair amount of Permalon left over from previous projects, I could stick with the thin stuff, and use a piece of Permalon for an under-layment. Hey, it's free!
Spring Hill, FL