The 3' concave sheer descent in my pool sprays out like a V. It comes out about 3+ foot in the center and hardly trickles out the sides. The opening at the face is clean and debris free. You can stick a thin piece of metal all the way back and feel no obstruction across the entire face. My sheer descent has a stand alone 1.5 hp pump that does not go through the main filter. The only filtration is the strainer basket at the pump.
I have the suspicion that the baffles are clogged with pine needles.
Has anyone ever had luck cleaning out a sheer descent? I can cut the PVC at the back and will be able to vacuum from the back side. But I am not hopeful this will clean it out.