There's just the sponge in there right now (I just got the filter the other day). Is there supposed to be more in there? I know both my other filters have bags of something, and a sponge. Is there something missing? Or am I just crazy?
Yeah, blue thing looks like bio media. Then it looks like there's a frame holding a carbon bag in front of that, correct? Like butterfly said, you could add floss, but it isn't necessary.
Yeah, a lot of people just empty the carbon out of the bags (or don't fill them, or fill them with a little bit of filter floss). The carbon only has limited effect, and eventually will degrade and release everything it's soaked up back into the tank. It's best used for removing medicine and helping clean the tank if you've spilled something in it.
Hi, I had the same filter before I replaced it with an Aquaclear 30. Your filter is missing something that my filter had, which is a white sponge in a plastic frame that slid in right in behind the blue sponge, next to the out take. That was the biological part of the filter.