Thanks for the opinions. Well, you can get high water exposure (a lot of water flowing through) without having high current. I want the water to flow through, but I don't want it to rush through and upset anything hanging out in the refugium (ie, corals, macroalgae, fish that got beat up in the display, etc). I figured that for nutrient export via macroalgae's consumption of nitrates/etc I'd want my water to flow through at a good tick to expose the nutrients to the plants. I'm designing my own refugium, and some of us from the DIY
forum were discussing flow rates through the actual refugium area (which, yes scuba, will be a "compartment" in the sump). Just wanted to get the mainstream view on refugium flow rates. Again, thanks for your input, and more is welcome.
125 gallon saltwater: 55gal sump, 4 Blue-Green Chromis, Purple Tang, True Perc, Firefish, Royal Gramma, 5 Ricordea, Bubble Coral, 15 Pulsing Xenia, Green Star Polyps, Deresa clam, Green-Tip Torch Coral (about 11 "heads"!), Orange Montipora Cap, Purple M. Digitata, Green Slimer Acro. Yongei, 3 Orange M. Digitata, Pink&Green Acro. Millepora