Securing wood underwater in natural pool

[Jrosco34]

So I wanted to source oak as well but it was not available during my construction period. I ended up using untreated Pine and has worked very well. It's been 5 years and the wood is solid. As long as the wood stays underwater and you don't have it on an unlined pond it will last. Look up bog wood and the science behind it, wood doesn't rot if it isn't exposed to the air and mud where insects can get in it. Cedar would work too just really expensive, oak is what most of the people in Europe use as it is a more common wood there.