No idea where leak is coming from

[PoolDoc]

Just a caution -- finding pool leaks requires a careful, systematic, and patient process. Without this sort of approach, you are quite likely to get results you won't like.

[krdowns]

We had a leak last year after our new fiberglass pool was installed. It hadn't leaked until they poured the concrete decking. Turns out that the concrete truck backed over the conduit for the light, causing it to crack and leak behind the light. The pool builder installed a plug of some sort behind the light, which solved the problem. Best of luck.