I got myself the nano 150 on Tuesday. The first thing that impressed me was the packaging of the skimmer. Open opening the box every thing was neatly packed. There was even an welcome guide and installation instructions. Also included were possible problems with the skimmer and easy ways to solve those issues.. I put the skimmer together rather quickly. Was really simple. After I installed the skimmer I noticed it was producing foam a lot. Will attach pictures. After about two days I adjusted the water level on the skimmer. You can do that as it came with a hang on clip that u can tighten on anywhere on the skimmer. its only been 5 days now.. not sure on the actual break in period as skimmer is still new. Although it has settled down a lot. The skimmer is quiet enough for you to place in your bedroom. The air pump feeding my bio cubes makes more noise.