Hi. I have a 15 Ft round intex pool with the Intex sand filter and salt water system. My problem is that I can't get the air out of the system. When the filter runs there is always some air in the leaf basket area of the pump and then a lot of times when the pump turns off a whole lot of air gets sucked into the system and the leaf basket area is almost completely filled with air. Why is the happening???? There are no leaks, everything in under water…how is air getting in? The biggest problem is that when the pump goes to start again the next day, it has a hard time getting started because there is so much air. Please help. I have no idea how to solve this problem. TIA!!!!!