oh, boy!! that's a fantabulous dif!!!!
i agree, it IS to big to put in the tub (especially if it's upstairs)...wouldn't happen to have a second bath (with a shower stall) on the first floor, wouldya?!
just take a cloth and some clean water and wipe the leaves down.
and i wouldn't worry about it going anywhere...you managed to get the jade back to good health, i'm sure you'll do the same with the dif!!
if you only saw a few mealy's on the jade, i'd just keep an eye on it...i doubt it's fully infested at this point, so probably no need to do anything with the soil (or to give it a shower either - poor dear's been through enough already!).
i'm wondering why this happened now...in mid-winter...did you bring in any new
plants recently??
if so, check it and any other
plants for signs of the buggies!