<a href=showthread.php?s=&postid=9933953#post9933953 target=_blank>Originally posted</a> by KyleO
I don't think there is any set formula but there are a couple of things to think about. Think about the fact that there are lots of different corals with lots of different flow (and light) needs. There are lots of different configurations and ways to set up the powerheads to create different flow patterns to accommodate the different species in one tank and the thing I think about most is their natural environment. There are not many spots on the reef that does not have decent flow.