heres some reading on sumps also look around this site marc has alot of articles.......
http://www.melevsreef.com/acrylics/s...***/index.html
you dont need a vortech on that size tank i would run 2 of the new nano koralias (425gph)on a wave maker or the the 2x750gh on like the jbj wave maker save money for other things. also with a fuge you can run a skimmer in there.