<a href=showthread.php?s=&postid=14814174#post14814174 target=_blank>Originally posted</a> by EverettReef
Are you sure that picture is correct? It looks like you should have 3 pieces of glass forming a bubble trap before the return. If the picture is the way it is, there is nothing to keep anything in the middle section from flowing to the return section and your display tank. How about creating the bubble trap? Was the center section used perviously for a skimmer?