I choose three sea swirls for all of the returns for oscillating flow. I have 1 inch random flow generators at the output of those returns. The three sea swirl returns are hooked into a Abyzz 200 while two other returns use a once Ince fixed penductor plumbed out of an Abyzz 400 pump. Two return pump are used for redundancy. The pumps provide 4400 GPH and 6,060 respectively. Since the 200 pump is also hooked into the manifold that supplies my skimmer and calcium reactor, it is only running at 70% of maximum return. I have the 400 running at %. This feeds 2 returns with fixed penductors, my frag tank while I have a 1oo gallon surge system with an actuated ball valve plumbed in for extra flow.
The divided overflow allows me to have a hidden wave box that I have a Tunze 6255 pump in. The pump pushes 4800 GPH but is completely hidden!
I also use two Ecotech MP60's set up below the Tunze to push water across the back of the tank. In three of the corners of the tank, I am running a Maxspect XF280 gyre (6000 GPH). Additionally, I have an older Gyre 180 (???4000 GPH???)
