Switching Tanks- Logsitics

I have a mature 10g tank.

I have a new (to me) 29g tank into which all the inhabitants of the 10g will eventually be moved.

Right now there is a Penguin 125 BioWheel on the 10g. My plan is to move this filter to the 29g along with the 4 zebra danios to start its cycle. The Biowheel from the filter should be enough to cycle the tank. I will also be moving the plants and the remainder of the fish from the 10 to the 29after a couple days if all seems well.

The question is, if I put another filter with a fresh cartridge on the 10 (remember the 10 still has pygny cories and shrimp in it) will there be enough bacteria in the gravel and decorations to support the bioload?

there is a store 25 minutes away that sells Bio Spira so if the sh*t hits the fan I can save the day but I'd like to avoid that.

Oriongirl, I was favoring my timid method only because this is a used tank. Although I cleaned the hell out of it with Oxyclean I have this nagging fear that some long ago used medication could be waiting to seap in. I guess the fresh carbon in the Fluval cannister I'll be adding on should help with any of that though. Thanks.

LMB, I haven't made it there yet although I really want to. Its a real pain in the @ss for me to get to so I sort of need another reason to be in the area or a desperate need to purchase something to go. We'll see how tomorrow goes. I think we'll be out window shopping for some dwarf cichlids so maybe the fiance won't notice when I keep driving south