raiseing my edge

[DrDave]

Get rid of the wood bottom. That is what we have all advised. It is not needed if you have a concrete slab. The walls have to be strong enough at the corners to do this.

 

[DrCase]

Thanks for your advised.
The reasson I want to raise my pond, because my pond will be sitting outdoor on the cement floor. I am worry the wood frame on the bottom will get rotten when it rain. Am I worry too much? Thanks,

Use pressure treated wood and the concrete slab and you will have a happy pond for a long time
Just dont let treated wood leach over the top back into the pond