I see alot of people who have flow diverters near the pump to control suction for main drain and skimmer. In my case, i only have one inlet pipe coming out of the ground going into the pump. I read somewhere that you can adjust the flow within the skimmer itself. The skimmer has a side suction outlet, and a hole that goes straight down. I stuck my finger in the hole that goes straight down and it bottoms out. Can you guys explain how to change the flow for the skimmer and main drain, should it be set at 80/20 & 100 for vac? I included photos.