Closed Loop Or Not??? What Is Your Flow Rate's

[The Grizz]

Originally Posted by untamed

I have two darts on OM4way CLs. So that's maybe 7000gph. A third dart is the return, and I get about 1500 gph out of that one. DT is about 400 gallons...so that is about 21x.

SPS seem happy enough.

WOW only 21x. I have been told by so many that at 40x my 155 does not have enough flow for SPS. What is your secret?

[Reefer Rob]

For the past 3 years I've had Dart on a closed loop with 4 outlets, that's 3600 gph. Dart return feedind 2 Wavy Seas would be about 2400 gph with head loss. Display is 180G so that would be about 33 gph turnover.

Lately I've added a Maxjet mod to increase flow, but it tends to create more dead spots than just the closed loop. Right now I've moved it to laying on the bottom at the back to circulate the water between the 2 overflows. Still playing with it, maybe I'll add another one back there. With the Maxijet the flow would be 42.

[Marlin65]

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.