Help! Removing carbon filter.

[Ashleylh]

So last night when I came home I noticed some white fluff on my one of my dwarf rainbows lips and something small and stringy off his fin near his gill. This morning he was dead. I've bought some Api Pimafix from my lfs as a couple of my rasboras now have white front fins too. Not fluffy, more shiny and sticking out. The Primafix saidnto remove the carbon from my filter which I have but do i leave this out for the whole week of treatment and keep it in some of the tank water or let it dry out? Any help would be appreciated as I've never had to medicate fish before. Thanks

 

[PNWBettas]

I would remove the carbon cartridge and use a different media. Ceramic rings work well, in a media bag. If your tank is well established, the BB in the substrate and tank itself hopefully will be enough to not send you into a mini cycle. I would also post some photos here of your fishes illness, you may be able to get some recommendations for meds. White fuzz sounds a bit like colunmaris to me which is something that will need stronger meds, but of course its hard to tell without photos.

 

[kallililly1973]

Cut open the cartridge over a trash barrel and shake all the carbon out but keep the frame with the polyfill material on it as to not disturb your cycle.

 

[Ashleylh]

I have a fluval U4 filter so tbw carbon I believe is in 2 long strips along each side. I have removed them but left the white sponge like part in