Hi everyone. I am new to owning a pool. I have a problem that I can't figure out. I have 35 psi in my clean and clear plus (either 420 or 520) filter. I am not sure which I have. The returns to the pool or spa are very low pressure. When I turn on just spa jets, there is no jet motion in the spa. Could my pump not be primed? Could I have a leak in the filter somewhere? I did recently remove the filter top to clean the cartridges. Could I have overtightened the strap? I have new cartridges (PCC105) arriving Wednesday. I also noticed small air bubbles coming from the pool and spa returns. Yesterday, I also noticed a wet spot at the top of the filter where the pressure guage conencts to the filter body. The pump had been running for several hours.