Is there anything wrong with just having very cold water (~2.5 gal) in the fermentor then adding the hot wort (~2.5 gal boiled down from 3 or so) to cool it down quickly? Or do I need to chill the boil pot quickly, THEN add to the fermentor? The former seems much easier, but will it cause any problems?
I have a plastic bucket fermentor and I should be receiving a BB in the mail any day now... would that method only be acceptable with glass?
BB as in Betta Bottle? These are plastic and although I wouldn't be 100%, but I would imagine they're pretty resistant to temperature changes. Mine feels like you could kick it down a mountain and it'd be fine.
from personal experience, do NOT pour hot boiling wort into a better bottle if you want to keep it from melting, warping, and potentially losing its low o2 permeability properties. they are rated to 60C or 140F as the MAX.