I have an inground pool 18' X 32'. It has a liner and a steel frame under it. Sometime in the last few weeks we have discovered a bubble under the liner in the shallow end. Anyone know if this means we have a leak? One of the kids stepped on it and the air tried to escape up the side and made a huge noise! Thanks for your advice!

It is very difficult to develop a bubble under a liner so there is a very slight chance this could be a gas leak or a radon escape from the soil. If the bubble returns tell us about it. You do not have a water leak from what you have said so far.