i have been running my new 9012 skimmer for ten days. As it’s still under break-in period and I mainly do the immersion depth adjustment. At the beginning days there were too much micro bubbles, but they almost disappeared now. After days’ try and adjustment it skims well now. Only one issue is that it’s very noisy, I can hear its running sound even in my 2nd floor bedroom (my tank is in 1st floor). Does anyone know if the noise will disappear after more time’s break in? Thanks!