[wesley6610]

Okay, well I would suggest using either the 10, 15, or 20 H to get your refugium going, what size and kind of protein skimmer do you have? Is it hang on the back style? If so I would suggest leaving it on the display tank and instead I would use the sump strictly for macroalgae filtration and perhaps a DSB and som LR rubble. If you do it this way, you maximize a little sump area and still get the benefits of a reguim under your stand. Also, it will allow you to avoid skimmer level fluctuations that can come from evaporation of such a small sump size. You will just have to partition off the return pump area in the sump and make sure you have the right size pump, perhaps a Rio 1100 would do the trick. Also, you will have to get a overflow box or DIY one to deliver the water to the sump if your tank doesn't already have a built in overflow area. I would estimate that this entire project purchased and not DIY should cost about $200, but the benefits far outweigh that initial setup.

Let me know if I can help further.