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Originally Posted by realfishy1  I am running a hammerhead pump on my 230 gal reef this puts out 5800 gal/h . I say the more flow the better . |
not necessarily, depends on what you have in tank. too much flow can cause micro-bubbles and your sand to be blown around.
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Water movement
Water movement is important in the reef aquarium with different types of coral requiring different flow rates. At present, many hobbyists advocate a water turnover rate of 10x: 10 volums per hour x aquarium capacity in gallons = required flow in gallons per hour. This is a general rule with many exceptions. For instance, Mushroom Coral requires little flow and is commonly found in crevices near the base of the reef. Species such as Acropora and Montipora thrive under much more turbulent conditions in the range of 30 to 40 times more flow, which imitates breaking waves in shallow water near the tip of the reef. The directions which water pumps are pointed within an aquarium will have a large effect on flow speeds.
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I added the highlighting.