Zer0
is back to save the day!
As for the sump, i would use this link. You will learn everything you need to know from it.
http://www.aquariumadvice.com/articles/articles/4/1/Sumps-Explained/Page1.html
http://www.aquariumadvice.com/articles/articles/4/1/Sumps-Explained/Page1.html