Consider adding an OM4 way to your planned closed loop. You'll get 2 of the four outlets going at any given time and get a more random flow.
The single 2" intank for the single Dart works well. Make sure you use a really large strainer on it to prevent suction and save critters. Also make sure you can easily access that strainer for quick replacement/cleaning.
I really like the planned layout.
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Fishlist: Tangs: Yellow, Vlamingi, Blonde Naso, Unicorn, Atlantic Blue
Others: Maroon Clown(s), Foxface, Majestic Angel, Hawkfish and more..
Current Tank Info: 400gal Envision Acrylic reef started 04/07
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