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I have a question and have
had a hard time finding the answer.
We are building
a new pond and want to line part (not all) of the edge with
round wood
posts like you see in Japanese garden ponds. My question
is what type of wood is used? I know not to use treated lumber,
as it will give off toxins. My pond will ultimately be 15,000
gallons.
Also, how are
the posts are installed?
Let me know if
you can help. Or if you can point me in the right direction.
Thank you.
Jeff,
I am responding to your email regarding pond edge treatment.
We have used what I believe are both the CCA treated posts and
creosote treated posts around areas of one of our ponds. They
cover a relatively small portion of the pond which contains
approximately 450,000 gallons of water. We have never had any
obvious toxicity problems. My best guess is that if you are
restrained in the use of treated poles (I would not use creosote)
you would have no problems.
Other than treated poles, I believe you
would be limited to rot resistant wood such as cedar, redwood,
red cypress, etc. There may be some concrete 'wood like' poles
available depending on your aesthetic needs.
Ideally the posts would be set to a point
below frost line and anchored in concrete to keep any frost
heave from occurring. Practicality sometimes makes that difficult.
Best of luck,
Tim Gruner
Head Gardener
Anderson
Japanese Gardens
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