I am into the 5th month of this set-up (took down a 600 gal into the 1200gal) and I am amazed at the flow created by 8 vortech pumps at one side in a dry boy built into the system.check out Youtube 1200 gallon reef at 9000 feet by Jake Adams. I recently added a Tunze 6301 to create a little more flow in the middle of the tank. The other major change was a Euro Brace on the top with two three inch cross pieces on a 10'X5" tank. These are powder coated and no restriction of light from the top. Running Prodibio addetives with not one spec of algae in 5 months. I feed the tank very heavy. Steve