<a href=showthread.php?s=&postid=12593210#post12593210 target=_blank>Originally posted</a> by EcoTech Marine
For a 541 gallon aquarium, two 3000gph is not an appropriate amount of flow. Please consider at least four pumps, two placed on the sides and two placed on the back wall. You may also want to consider as many as six pumps.
-Tim