UPDATE: Decided to rip out the fiberglass crack repair job.
Working on my 40 year old homemade, concrete pool. It has many problems, but here's the one that causing me a leak. In case you cannot make out the photo (I will post more if necessary), the corner of this pool has fiberglass patching over the concrete. Apparently, way back when it leaked and they decided to patch this corner and the rest of the pool with fiberglass (kind you get a auto parts store). Now it's leaking. I used some pool puddy on some of it (see in the picture) and it will stop some of the leak. I have recently (not shown in photo) put more pool puddy down the same area as the other putty in the picture. It seems to be leaking where the fiberglass meets the original concrete.
I thought of EZ Patch but I'm not sure if that stuff will stick to the fiberglass and/or painted concrete wall.
Suggestions (other than making it a garden----my idea, but wife won't go for it)?