please help

i just transferd my tank to saltwater and i baught the "super skimmer" made my coral life. i set it up and everythign was fine until i started to move rocks around last night then the filter started shoolting water everywere and it was a big mess. i finallly tweaked with the gauges on the filter and it went back to normal, now there is a new problem, on the super skimmer OUTLET there is a bubble gaurd to prevent bubbles in my tank. but there are millions of micro bubbles flowing out the bottom of it and i cant fix it! has this happend to anyone before??/ please help, thanks