Partially above ground natural pool

Hi guys,

I have a project.
Last summer I destroyed and old house on my small land. I kept the concrete block fondation (16'X28' 6'height) to make a natural pool. Two of the walls are partially above the ground approx 4' (would love to show you pics...). The inside of the fondation is convered with urethane. A landscape worker told me those walls may not be strong enough. He told me I should put big stones to keep the walls from breaking.

Any opinions/ advises for me?
Thanks for your time!!
Hope my english is understandable...

Upgraded your membership.

Unfortunately, this sort of question is one that almost never gets answered well online . . . the fact that you are in Quebec makes it even MORE unlikely that useful answers will be posted.

Sorry; I have no good answer for you. If you are lucky, and can find someone really knowledgeable locally that is by FAR your best option!

Closing thread. . .