Ok can someone help me figure this out cause me and 2 of my buddies are stumped. I got a Red sea berlin triple pass skimmer ( I know they suck) I got a Rio 2100 pump to run it. It hardly makes any bubbles in my sump but get this... I take to it my buddy who I got it from. Put it in a bucket of water he just did a water change. It worked perfect! TONS of bubbles. Take it back home put it in mine and only about half as many bubbles. Nothing changed... Does it only make a lot of bubbles if the water is really dirty or shouldnt it no matter what? I just dont understand....