O.k. gotcha so 2 fuge's 1 sump. (I could have gone back to the beginning, but too much work) :sleeping:
It's a little bit of a misnomer to call it a closed loop, but I understand what you're saying.
Are you going to have any pumps for circulation inside the fuge's?
I've read a couple posts where people talk about slow flow thru the fuge to give your macroalgaes the benefit of longer contact time with the water. And more time to remove excess nutrients out. The flow seems good to me, but I JUST hooked up my refugium. Not your best expert by any means.