Whew, so many pages! Hi Mojo et al, I have a 20 gallon reef tank with a 10 gallon sump (no refugium) and I am looking to replace my Remora skimmer. Bioload: Tank is 4 months old, 25 pounds of live rock covered in coralline algae, shallow sandbed, 2 large LPS corals, a few SPS corals, 15 heads of Dendros, many assorted mushrooms, coco worm, 3 fish, assorted cleanup crew of snails and crabs...so I guess my load is moderate. My sump has only a small section whereby I could put a skimmer but it is only 5.5" width by 9" in length (water level in sump is about 9 inches BTW), and the height of the cabinet is only 28" so I don't have much room to work with. That is why I went with the Remora HOB. Do you have any recommendations for me, I think I would prefer another HOB. Thanks.