Hello. We put our pool in mid summer last year, so this is my first time attempting to open it. Everything seems to be going well, water is nice and clear. Filled it, got the pump and everything up and running, put some super shock in it and thought I was golden. I had a quick look at the pressure gauge on the sand filter, and regardless of whether or not the pump is on, the gauge is wrapped all the way around and is stuck on the stopper thing. Can I assume the gauge is bad? I'd call the guy who installed the pool, but he is impossible to get in touch with, so I've given up on him. Have a look at the pic;