why not use a metal hose clamp for that and then if you ever have to replace the hose for some reason it would be a lot easier and quicker, If you glue it you might have a real hard time getting it off !
HomeDepot sell silicone glue. You'll need to do some light sanding on the tubes to ensure that it sticks good. Another option is to get this kit from Eheim. This one will hold up a lot better.
Sorry, I was very tired the other night and did not read the first part of the tread. I somehow thought you were gluing the hose to intake on top of filter! I too thought about gluing mine also but it seems easier to clean if i can break them out.