I have a new pool that was built last fall. I had it opened a few days ago by the pool company, and I've noticed that it seems like there is air coming from the return jets. If I look at the strainer basket window, when the pump is running on high speed there is no air at all in the pump basket (that I can see). If I run the pump at a lower speed, then the basket does start to have more air in it, to the point where at a low speed the basket isn't filled up. Regardless of the speed I still see some air coming from the jets. Any suggestions on where for me to look first?