I may be starting to "get" this, but after a 2-3 days of running the pump (2hrs X 2/day) I see not just little bits and pieces of debris in the strainer basket, but whole leaves. I know these did not come from my skimmer, and I didn't vacuum the pool. So the two bottom drains in the pool can also suck in complete oak tree leaves? They are brown and very soft. I didn't realize that the bottom drains had such pressure, though it seems they are every bit as strong as the skimmer itself.
A little education needed here...