I think the real key here is gonna be what type of medium yu are gonna use in the bubbler. I am completely unexperienced with this situation but if it were me, and I assume yu will be going into hydroton (which is usually what ya use in bubblers i think), rinsing and placing tender, naked roots into that is a disaster waiting to happen,:doh: I would either use some sort of peat plug that is split (or rockwool plug) so that the seedling can be protected within a softer environment, and then set into the hydroton, or use a coco cup and take the same size amount of soil (as would fit in the cup) up with the seedling within it and put it in the coco cup, then set that in the hydroton. Disturbing the roots at this point I don't think is too critical so long as they aren't damaged. If yu do use the soil in the bubbler, make sure yu put it in a cup of some sort or yu will constantly stop up yer system. Good luck and good grow mojo:farm: