300ft. Theyre at the top, but detritus and ants and stuff must be falling down the shaft and getting sucked into the pump. It does make not too much sense though, as some of the stuff is huge, and the pump has gotta have a screen on it like you described.How shallow is your well? Just puzzled thinking about how ants could get in the well or filter(s). Granted, most wells around here are in the 250-300' deep range.