Welcome to the Forum!

Pics would certainly help!

I've have lots of experience with liner pools and a few pics would help me narrow down what your problm is and allow me to proffer some suggestions.

There are posts that are stickied telling how to patch a liner, get a liner back into it's track and using (and caring) for a DE filter. You can use the search function or just look through the forums and check out the stickies.

I'm around here on a quasi-regular basis and will gladly share any ideas that I have.