Darren's reactor works well. Here is the link on RC.
Be prepared to take about 8 hours to read the whole thing .... although towards the end the posts are starting to be fairly useless like "I'm going to build one too!" so you can probably stop reading at around page 40 or so.
http://reefcentral.com/forums/showth...hreadid=144438
It's a good read though. Lots of info stuff in there.