Actually After reading the papers and watching the video which I think applies to us more then anything that consitant current and not blasting current in the tank is very important which we already knew and am sure everyone would agree. I also agree with Jim that removing it from the DT is a must. My brain then went to my fuge which is where in my system the real exportation of nutrients occurs. In my new tank I added power heads and elevated my rock and skimmers. I am reading this as maybe I was thinking correctly but not completely . I added the power heads to keep detritus from settling on the bottom to keep it suspended and allow it to reach the skimmers better. If I am reading this correctly,adding the power heads is also allowing the bacteria a better chance to do it's job before the skimmers get busy doing the rest of the exportation. It also reaffirms Anthony Calfo's statement of fuge water volume for positive biological reaction . Calfo states in several of his books that if your fuge exceeds 1000 gph you are defeating the intention of the biological process. I found the papers to be very interesting and help me to Decied to keep the power heads in the fuge and skimmer chamber that I was debating about removing them. It also makes me think not using a DSB was a good idea. That's my take and my .02.