i have this fungus on my eba, and it has been there for a while. i have used other fungus-be-gone products before pimafix and none have worked out so far. then i was told about pimafix and how awesome it works for this kind of problem. i already added it to my tank, and i removed the carbon cartridge, but i am wondering, is it truely effective? and when it says to remove the carbon cartridge, does it mean the filter and undergravel filter, and does it mean for all 7 days of treatment?