Shrimp,
First I am sorry you have not been answered, sometimes waiting a little bit pays off on this board when it comes to recieving information. One of the ways you can get you nitrate down is to do some water changes say 25% or more. Also keep up with your cleanings and try not to overfeed if you have fish. Hope this helps
As Chris implied, more information is needed to be helpful.
Also, you need to be patient with responses. It can take hours or even days to get a response. I see there was only 1 minute between your first two posts...