I am new pool owner, and I'm just trying to understand how my pool works and if something is wrong or not. We have a separate spa that is a little bit higher than the pool. What I notice is that when the pool pump motor is off, the water level in the spa drops to just above jets(?) and the water level in the pool is okay. When the pool pump motor is running, the one of the several jets in the spa starts pumping water into the spa. What results is the water level of the spa rises to the top but the water level in the pool drops to where I here gurgling in the skimmers. I am assuming that the water from the pool is being pumped into the spa? If the overflow in the pool is clogged with leaves, then water will actually start spilling over the top of the spa. I put water in the pool at this point, but the same thing seems to happen the next day when the pump runs.
I hope this made sense how I described it. Is this a correct or common setup? Can I stablize the water level between the pool and spa somehow? Is this just the way it needs to be?