canister filter cleaning ?

[marcs4020]

I just bought a proquatics canister filter the other day and had a quick question about which media I should change/clean on a monthly basis. My fliter consists(from top to bottom) a sponge, activated carbon. zeolite, ceramic chips, and then another sponge on the top. I've heard quite a few different answers to this question so any feedback would be great.
thanks a lot
marc

 

[arkey.d]

I would replace the carbon monthly and rinse your sponges in saltwater, if you use fresh water you'll kill any bacteria that is in the sponges.....