This sort of makes sense to me but I wanted to see if I was off. The pool is over 35 years old and the steps are fiberglass, and there's some cracking in the gelcoat, and a few pieces actually missing now, where you can see the strands of fiberglass underneath. I think this is a likely spot for leaking, and I was going to try and repair it with some JenWeld that is supposed to work underwater. Love to hear anyone's thoughts! Thanks !