I am using a Fluval 105 for my 10G fresh water tank. At the moment I have carbon in the bottom tray, and fluval biomax and polishing pads in the top tray. I really don't think I need the carbon, so once it has worn off in a week or so I am going to replace it with something more useful.
I understand how each filter media works, but can someone please explain the science behind which order they go in. Many people recommend adding the bio media in the bottom tray and adding the polishing pads on the top. Why can't I add the polishing pads on the bottom which will help prevent the bio media getting dirty with small particles which pass through the larger foam.
Thanks
I understand how each filter media works, but can someone please explain the science behind which order they go in. Many people recommend adding the bio media in the bottom tray and adding the polishing pads on the top. Why can't I add the polishing pads on the bottom which will help prevent the bio media getting dirty with small particles which pass through the larger foam.
Thanks