Doesn't appear to have any leaks. Both tanks are full of tap water now. Overflowing into the sump from the display tank.
Neil Another one is to just have a stand off 50mm pipe with a durso without a box.
If you do a google image search for "External durso" you'll get some idea's. not sure if this link will work Error 403 (Forbidden)!!1Do you have a photo of this?
and the bottom glass?Can't drill frame built around tank and back glass tempered
Bostic marine safe silicone or den braven aqua, the latter being the more seperior IMHO.