hey guys, well i got my sump built and installed, started cycling but now im stumped with this skimmer. really aggravating. i cant keep my water level in between the min/max lines. the cup fills up within a minute with water.. the gate valve is opened all the way, i dont know how to keep it low. i tried closing the two holes in the muffler/silencer and that helped a little but now i have billions of micro bubbles in the sump. what am i doing wrong? the instructions that come with the skimmer are not for beginners with skimmers. they dont explain how to adjust properly. sheesh, really stumped.any advice?