When I had the Magnum, I run the media basket with the blue foam sleeve 24/7, and I only need to clean the sleeve maybe once every 2 weeks. <I never change out the carbon. For me, I use the carbon as a surface for the bacteria to grow on - a cheap alternative to ceramic bio-media.>
I only run the Micron filter (the paper one) to clear up cloudiness in the water. The Micron filter plugs up in just a few hours, but it does clear up water very well. <In practice, the foam sleeve keeps the water clear enough for me so I rarely have to resort to the Micron filter "water polishing". It comes in handy if you have green water or fine particulates when you first add some of the plant substrates.>
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.