Thanks for the reply.

I pump out any rain water immediately, visually the concrete bottom of the pool looks in good shape for a 25 year old pool and so do the steel walls. The concrete bottom just has a one hairline crack that is hardly noticeable. Yes the installer called me late this afternoon and said it is normal to have some run-off water entering the pool through the panels when the liner is removed and not to worry. Except for replacing one pump and one sand filter I have had no trouble with this pool and we have been here for 20 years.