flow through the sump

[kwirky]

I'm confused as to how fast water should be moving through a sump. There are so many factors involved. How much water should flow through it for the skimmer to have stuff to pull out? If that needs to be high, then how about people who use low flow through their sumps to cut down on noise/micro-bubbles?

Anyone with their experiences with slow/fast flowing sumps and what they liked/disliked?