The answer is yes but it would be better to just put some filter media in your sump and let the bacteria colonize there. Then move that to your QT. After your done w/ QT, sterilize the media and put it back for re-colonization.
Curing the LR
will take some time, having colonized media ready to go by placing some in your sump. If you don't have a sump, steal some from your HOB
; run a small HOB
on your main; put extra media in your canister that you can take out.
If you decide to use the LR
don't put it in the display when you are done.