I have been looking at making an ATS for my tanks because of the nitrates levels but haven't done it yet. I have the parts, just haven't had time to put it all together. I think I will wait until I merg them into my 180 and do one for the 180 and my BC 14 at the office. The change you got is impressive and I'm glad it worked.
Just make sure you read up. go through this thread and follow the directions santa monica gives and it will work like a dream. Light placement, screen material, flow, and regular cleanings are very very important.
I'll answer any questions you guys have about that too.
nitrate and phospate have been at 0 since this has been installed. only 1 water change.