I'd keep the carbon and the sponge, dump the ceramic rings. Some swap the sponge to the bottom, the carbon in the middle, and then poly filter/ filter floss on the top.
I've got the HQI and once I swapped to the above, it was much easier to clean, and I also had less crap accumulating in the bottom.
Some folks even remove the entire media tray and use that as a fuge.
Do a google search and you'll get more info than you ever wanted