Can you describe your tank in more detail?
How much love rock? Reef or FOWLR (fish only with live rock)? Skimmer?
You will find upon reading many sources that filters can really be a nuisance and not helpful.
Take a look at the sticky called SETTING UP and see what it says about filtration.
There is also a thread the other day about new tank info - has a nice summary.
Edit link:
Since we have so many new tanks this week---some advice.
http://www.reefcentral.com/forums/showthread.php?t=2547716
- ryan