I run a Dart on my 75 Gal with a OM 4 way and only a 600Gal an hour return.
Even with that I think I could use more flow. I have Zoe's right up to the outlets they love the flow. The rest is mainly SPS and a few clams. Its a matter of putting them in the right place as long as you don't have direct flow on them they will be fine. I love my dart no power heads to clean or look at. You can see two of my outlets in the picture BTM front corners.
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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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