Join Date: Oct 2012
Location: LawnGuyLand, NY
I personally go in every 6 months and change out the sponge pads depending on how nasty it looks after it's cleaned out in tank water, Bio-media just gets rinsed in tank water to get off any large deposits, the Filter floss is usually at the top of the filter and that gets replaced at least once a month (or more depending on bio-load).
Filter floss is similar to quilt batting, Pillow stuffing. It kinda looks like a polyester cotton ball, it can be found at most LFS and just about every craft store I've ever been in.
I don't use carbon in my canister at all I use Chemi-Pure since it lasts for 6 months before needing to be replaced. If I need to use carbon for any reason I have a powerhead filter that I use for that purpose.