It looks like the ceramic rings in my 110 are beginning to be "pushed up" in the media basket from what appears to be a "swollen" carbon pouch -- is it possible this pouch is exhausted and needs to be thrown out or replaced with another kind of media?
What are the dangers of just taking the carbon pouch out at this point? (it's been running in the filter since I got it) If I want to drop PhosGuard (Seachem) into the area where the carbon was, in a media bag, is this a problem?
I know the bio rings really shouldn't be replaced in these AC
HOBs, but what about the sponge block? Do these just need occasional rinsing?