So say I have my QT up and running with a colonized sponge filter. After my fish leave QT I want to keep the QT going all the time. Do I have to ghost feed the QT to keep the beneficial bacteria alive? If so, how often?
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Many reasons. Mainly so I don't have to setup a fresh QT when new fish arrivals come. I'm not putting a sponge filter that has possibly been treated with copper/prazi/ect back into DT sump. Sure I can buy new ones each time and wait for them to seed. But no thanks.Is there a reason behind keeping it running? If you keep your sponge filter in the display tank sump you don't need to to worry about the QT.
Here and there as in once a week? Every few days? Not sure how long it takes for bacteria to die off. So you would nuke QT after you treated ich with copper?I keep mine running and drop a few Spectrum pellets in here and there.
With that said if a fish/coral showed any signs of illness (bacteria/parasite/fungus) I "nuke" the system. Which means bleach everything then restart and seed with bottled bacteria.

