Fiberglass Pool - sidewall is buckling / bending

I have a 30 year old fiberglass pool in a moderate Northern California climate.
The sidewall is bending inwards about 2 or 3 inches...possibly a nearby tree root.
Anybody know how much it will bend before breaking?
Suggestions, other then ripping-up the concrete and digging-down to have a look for tree roots??
Any experts in Santa Clara COunty who could take a look for me?
Thanks
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H. Potter wrote:>

That was helpful...are there any pool structure experts out there?
Karl
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