Looking for advice on my pump/filter set up.
Background: We had some work done on our pebble-tech finish last week, so we've been pulling rocks and fine gravel out of the pool. Also last week, the backwash was leaking so we had the o-rings there changed. That problem fixed. In addition to the gravel we've been dealing with, we're getting tons of small leaves from our neighbor's tree that keeps the skimmer basket full on a daily basis.
Now, the pump is running very noisy and the pressure gauge on the sand filter is reading 0 when it was reading about 15 psi before. It does appear to be circulating though, I can see water and air bubbles coming out the returns in the pool. I have no idea where to start, but I'd like some ideas before I call the pool guy. :-p Is the pump broken? Why would the gauge read zero when it still appears to be moving water a bit? I don't know much about the pump, the previous owners left no documentation and I don't know how to figure out the hp or rate of the pump.
Any ideas would be appreciated! Thanks very much.