I have the Marina s10 filter with both and the cartridges come with carbon on the top section and ceramic media in the bottom section... (their own compartment) I took out the carbon and stuffed sponge into the cavity left behind because there was a thread on here about carbon becoming toxic after some time... freaked me out! lol
I have the azoo palm filter and I set it up with sponge and ceramic.. I had it on my 2.5gl which I feel was a mistake even tho i baffled the outflow.. so current was not strong. I took it off and currently have it running on a critter keeper till I decide what to do with it.. thinking about using it on a 3gl sometime in the future so was trying to get some BB going in it.
I'm still a novice in most of these procedures and am trying to find the best thing for these beautiful fishies! lol
still got a lot to think and decide on..