seeberger said:Just a couple more thoughts after pulling more hair out today ... when I close the skimmer door in the deep end, it doesn't make that swirling vortex of water down the line like it used to (it's very faint). Also, the shallow end water inlet shooting water back into the pool seems to have waaaay more pressure than it should. Could this be explained by a clog? I checked the heater and unfortunately there is not a valve to by-pass it.