It's going to depnd on the size/dimensions of your tank, how much rock you have and how the rock is stacked but I have a 3-foot 40 breeder with a medium amount of rock and LPS at various heights throughout. My MP-10 is located on one end and set on reefcrest at about 55%. I also have a Tunze 6025 (modded) but that pump is situated on the other side and bonces off the back glass so no LPS are in direct flow from that pump. I find if I go any higer with the MP-10 my acans, scoly and fungia tend to close up.