I have 2 of them in my 90. I cant say that its too much flow, but the 6060 can not be controlled. Its on or off. They definitely put out a lot of flow. My problems have been adjusting them to not blow sand all over the place, and to also allow me to place corals where they look good. At times I shut one down. I am seriously considering running only one and a 2nd powerhead that oscillates. After having the 2 of them in a 90, if I was setting up a 75 I would probably not buy them for it. Maybe a set of Seio 820's?
just my $.02