Yes...I think we have a leak. I've been working on trying to pinpoint the leak for several days. We have a Triton Pac Fab T-60 Sand Filter (flow rate 60gpm). I have no idea how old it is but I'm assuming at least 20 years. The sand was changed 2 summers ago. The pump was replaced last summer and apparently it is too big for the filter (Sta-Rite 1 1/2 horsepower).