I pull the filter pad out of my sump every couple of days and rinse it out in the sink. The entire operation takes only a couple minutes. I know my Eheim 2276 Pro 3 will completely break down the fish waste into Nitrates but my sump will do the same AND I can easily remove the waste BEFORE it is turned into Nitrates. I am moving into terrestrial plant (veggie) filters as a lower maintenance way to filter a tank. With the dozen or so Pothos plants I have just hanging over the edge of my tank now my Nitrates stay under 10ppm with limited water changes.