That's a good plan :)

The important thing, too, with a QT is have it running all the time, with a sponge filter (to hold the nitrogen cycle bacteria), so that it cycled and ready to go. Otherwise, you will have the same issues as with a new tank with ammonia, nitrite, etc., and hurt (maybe kill) your new fish unwittingly.

I use an Aquaclear 50 on my 20g QT and after use I toss the foams and put new ones in the sump to seed them for next time
Then when it's time to QT something, a quick DT WC and the 20g is filled with old tank water

Don't know what you can do with that biowheel or whether or not replacements are cheap enough

I am just going to fill the power filter with sponge plus I got a separate sponge and air pump for more filtration and with the bio wheel should hopefully give me enough bio filtration