Hi all,Been away a while, but I really want to get my seahorse tank going. I'm looking for plumbing to use to complete my overflow. I built a small "glass corner box" as overflow and got a 50mm hole drilled through the back glass. I need to plumb this so that the water can flow through a pipe/connection through the whole down to the sump. I guess I need the same kind of connection as for a bottom-glass-drilled tank, but where to find it ... Anyone able to help?Thanks.