If you really want to put the moor into the 120, this is an option: a couple of years ago, when I picked up a tiny datnoid and a much larger green terror. I placed them both in the same qt, but not wanting to take any chances, I placed the tiny dat in a diy protective "cage". I bought a plastic container with a lid: drilled a bunch of holes into it with an old soldering iron; cut 2 sections of 1/2" pvc, sealed the ends of the pvc with hot glue to trap in air, then hot glued the 2 pvc sections to the lid to act as floatation devices, cut a hole on top of lid for feeding access.