This is my first time running a pool. This winter we got a lot of leaves in the bottom so my Dad told us to shut off the main drain valve until we got them cleaned out. I think it may have been too late though because when I put it back on the filters suck water really quickly and the water doesn't fill up in them and it blows out bubbles from the jets. The water level doesn't seem to go down quickly. I had it on losing water very slowly for a week before I even noticed. It became more apparent when I was manually vacuuming because we accumulated a lot of dirt and grit in the bottom from the leaves.
Is this a leak and if so how do I figure out where it's leaking? I don't see water anywhere. Right now I have the valve shut off again, I hear it makes life easier if I can have it on to get out the grit.