CaysE
Aquarium Advice Freak
I have an AquaClear 50 with the AC mechanical filter on the bottom and carbon on top of that, with a large-cell foam pre-filter on the intake tube. On the packaging for the media, I'm supposed to change the carbon once a month (let's say the 1st of the month), and alternate between cleaning and replacing the foam once a month in between the carbon replacements (let's say the 14th of the month). So the foam gets replaced once every two months. Is this the schedule everyone else follows or is there a better way to do it?