I think we have a leak...maybe at the skimmmer?

[Poconos]

Looks like some optical artifacts in the pic. Are you referring to the thing that looks like a thick hair coming toward the center from the upper left or the arc or semicircular type thing that looks like a crack or gap running from about 11 to 2 o'clock positions? If it/they are cracks there are ways to patch it. Some people here recommend some type of epoxies, I patched mine with a mush made of PVC cement and ground up PVC pipe. More details if we get to that and others can chime in with their recommendations. Temporarily you can squish some silicone seal (caulk) in there to see if the leak stops. It won't stick so you can easily peel it off for a real fix later.
Al