Hi, I have a 19 x 37 Pacific Graphex inground pool with two returns in the stairs, and when I try turning the air control on the top of the steps to get the air to mix with the water coming out the returns all I get is the water flowing out of control. Does anyone know how I can get the air to once again go out thru the returns? It was fine last year but after we opened the pool this spring we can't get it to work.

Thanks,

Jan