I walked around it a few times checking it out, and all I could see was the intake and spraybars of what looked like a couple of 2217s. Both of which were turned off. Each section had some airlines with airstones attached, but that seemed to be all that was moving the water. There were a few 3/4" lines hard-plumed into it at the bottom, but all had the ball-valves closed. It was a real shame.