Hey Thor, I started a 450g exactly like yours in October, and just came acrossed your thread....sweet stuff. I also have the Reeflo 250...didn't mod it with the longer neck and collection cup yet though. Did you add the upgraded needle wheel also? It looks like you used a different pipe (or cut the stock pipe) from your skimmer return just below the neck...or did you use the super short pipe for the first riser? I am still trying to dial in my skimmer, but with only 5 tangs in my tank I think I am getting just about everything out I can. Thanks for the info!