I am impressed with this small skimmer. I downgraded from a Bubble Magus Curve 7, which was oversized for my Red Sea 200XL G2. I wasn't expecting much but the Curve 2 has exceeded my expectations. It started producing skim minutes after installation, is ultra quiet, easy to adjust mounting height, and very easy to tune.My only complaint is that I received this item without a manual or any instructions. Although assembly is very straight forward it would have been helpful to read the manufacturers instructions as a guide to understanding how to best optimize its performance. This skimmer is on a 50g system inside my sump. Highly recommended if you're looking for quiet operation and good performance.