I don't have any experience with this particular skimmer, but when I researched to buy mine, I looked at this and nearly every review said to save your money. Most mention that it is nearly impossible to get dry skimate, and that it produces a lot of micro bubbles. If you would like to read some first hand reviews, check out marine depot
Current USA Fission Nano-Skimmer (Saltwater Aquarium Supplies > Protein Skimmers > In-Sump > Venturi )