From what I have seen,
The more a person filters the smallest bits out of his aquarium or pond water, the more you need to change the filter media because it gets plugged faster.
For a very dirty tank I think if you were to add to your filter some very fine filter media that would catch all the little bits , you would find that your filter was then plugged within an hour or less of being turned on.
I wish there would be some way to "dial down" a filter so that at first you can catch and trap all the bigger bits. then change a filter setting and start to trap the smaller bits, then later trap all the little bits in the water...