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- Nov 9, 2014
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Hey i have a sponge that has been in my main display sump. Can i put that in my QT tank tied to the pvc? I already have 2 sponges in the HOB filter but figure why not add that extra bacteria to help out. Just not sure if i can add it directly in the tank.
The more seeded sponges the merrier.
But what does, "my QT tank tied to the pvc" mean? The sponge needs to have flow running thru it in order to be useful. Or water being sucked into it if using an air driven sponge.

