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Originally Posted by prow  might need to tinker with the bubble level. maybe lower to half way up the first neck, dont know what that part is called. |
That changes from wet skim to dry. I know that fairly well with this skimmer. This whole question start from an article I scanned that talked about the air (lph maybe) for another needle wheel skimmer placed at different depths in the sump. Made me question whether the couple inches difference would see a huge change in skimate.