Long time reader, first time poster. I purchased a house with a gunite pool a few months ago, and the pool started to develop cracks and leak at a pretty rapid rate. I called a leak detection service and they came out and verified that my plumbing was fine and the crack was indeed the source of the leak. They patched the crack underwater with epoxy and said that should hold for 6-8 months depending, but that it will always begin to leak again eventually.
The pool has started to leak again, and this time I've noticed a new crack, and am attempting to patch it myself with JB Water Weld (http://www.jbweld.com/product/j-b-waterweld/)
Has anyone had success repairing cracks like this? I don't mind continuous temporary solutions, I think eventually the whole pool is going to need replaced. I just want to get though one or two swim seasons before I have to do that!!!!