I did the mod, that you cut out the inside shroud, for more flow. Now it vibrates and chatters. Did I do something wrong or is there a fix.
http://reefcentral.com/forums/showthread.php?s=&threadid=1025361&perpage=25&pagenumber=1
http://reefcentral.com/forums/showthread.php?s=&threadid=1025361&perpage=25&pagenumber=1