Looking to replace my old ETSS 700 Downdraft skimmer. My downdraft skimmer beomes very sensitive when I change the filter sock, change the GFO, carbon, use additive like Super Buffer, etc. It erupts like a volcano, so I need to open up the gate valve to stop the overflow. It does not clam down until some time later. I was wondering if the other type of skimmers, like needle wheel, pin wheel, beckett, etc will be different or are they the same animal?