right now i am using the amount that came with it for the ceramic media and i have (6) 4"x5" (which you can fit 3-4 per tray) carbon bags and a bag of PhosX.
I have the 304 and just used the ceramic that came with it. You should be good. If you run into problems with algae, we can discuss that later. It happened to me after about 5 months. I thought about LR
, but things seem ok for now. I want to give my tank a little more time to adjust to the changes I made.
Carbon is debatable, many people think it should be refreshed weekly, while others think it should only be run when necessary.
I would tend to agree with when it is needed...Weekly, IMO
, in larger tanks might be a bit too much. From my readings, it really just keeps the water clear and will filter out meds, as you said.