Shango, I had two of these for a little while and just took the last one down. I had two filters, two power heads, and a single 3/4 pipe down the back to connect. The pumps would "fight" for flow when the sponges start to fill and the power heads had a tendency not to restart. The idle power head becomes the past of least resistance and water + filth flows backwards etc. I would have a dedicated sponge for every power head (or multiple sponges per power head). A fun project! This set-up is so cool. Not today, but after I move I am definitely going to set one of these up. http://www.loaches.com/articles/river-tank-manifold-design Thanks Cory! On Jan 11, 2010, at 6:10 PM, Cory McElroy wrote: > river manifold system _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member