I know not to throw all the greeblies out. The stuff that impedes my filter's water flow is the leaves and rubbish in the end of the uplift. I never get such a massive buildup inside the sponges, trays etc to have an effect.
Can't say I like the sound of the Mattenfilter (from an aesthetic point of view) but haven't had a look at the link.
As an aside, I have never believed in using all these antibacterial soaps, sponges etc in the home. It is my belief a child should get dirty (up to a point of course) so they can slowly build up a certain immunity to basic bacteria. I read somewhere recently where a scientist reckons we are not as healthy (ie resistant to germs) as our ancestors because of our penchant (throw in a little French to counteract the German ) for cleaning. Those who know me know I do not clean if I can help it as I have better things to do with my time than slave away at housework!
My mother always remembers the neighbours who lived on eother side of her house when she was a child. The ones on one side were not alowed to play outside, were kept away from other children whenever possible and constantly being cleaned - they were always sick. The kids on the other side where always outside and playing in the dirt and were as rarely ill.
Not that it has anything to do with bacteria in aquarium filters but it is a related subject!