I'm thinking about getting the surface skimmer from Eheim for my cannister filter. I was told to do this with the bigger cannister filter I would need a T-adapter to do this. Does anyone know what size I would need and how do I connect both the intake and skimmer to it? Here is a picture of the T that I need just not sure what size.
http://www.marinedepot.com/md_viewItem.asp?idproduct=EH4005950
http://www.marinedepot.com/md_viewItem.asp?idproduct=EH4005950