Hmmm, maybe I'm not getting good suction.

Is there a way to measure that? It feels pretty strong to me on my hand, but then again I have nothing to compare it to. I think I have a 24" vacuum head and I definitely do not get suction the entire length of the head. I really only cover a few inches wide with each pass of the vacuum. I plug one of my skimmers when I vacuum to get better suction. I guess I'll also try turning off my main drain. One thing I've never understood, which could be a cause of poor suction, is that air always seems to get air in my system when I vacuum. Air is always gurgling out of the returns. I have no idea where it comes from since no air gets in when I am filtering normally. I always make sure my pool is full (middle of skimmers) before I vacuum.