Habitat - Indoor :: What to put in the filstar?

[alehasfriends]

I got a rena filstar xp3 with a 50 gallon tank for Prometheus who is around 5 inches. I was wondering what I should put in the filstar. So far i've got bio-stars, and I am going to but some bio-chem zorb, but, other than that, I'm not really sure. Also, how often should I change everything in the filter?
Thanks.

[Spookster]

In my XP3 I have:

Top basket from top to bottom:
1 Filstar Microfiltration pad
1 Box of Filstar Ceramic Rings and 1 box of Filstar Bio-Chem stars

Middle basket:
2 Filstar activated carbon pouches (number of carbon pouches depends on tank size. I have a 90 gallon which requires 2 pouches)

Bottom basket from top to bottom:
2 Filstar fine foam pads 30 pores per inch
2 Filstar coarse foam pads 20 pores per inch