I've just been pondering!
I know the little corner filters that you fill with dacron are mechanical filters and the external cannister filters are biological, with an element of mechanical filtration.
If I wanted to have one of the small internal corner filters running in a tank just so I could then use it to instantly cycle a new tank, would it work to fill it with ceramic noodles?
I am curious because I want to put one in the back corner of my L shaped tank, and it would be really difficult to get to if I had to change the dacron frequently. Maybe with noodles it would become more biological than mechanical and I wouldn't have to constantly rinse out filthy dacron.
Or would it just fill up with gunk and need rinsing out as often as dacron?
Cheers
Jude