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...