Hi, I acquired two nucs in early January and appear to be going strong. Brood box is filling up and capped honey on the outside frames. I have put an ideal super o top which they are drawing now. Should I have put another full depth brood box instead?
I personally would not.
Being a new colony and also March I would be inclined to let them build resources for winter.
Also a two brood box set up I have seen showed the colony moving up into the top box over winter leaving the bottom box empty, so the first spring job was to work through the apiary and flip the top box to the bottom again.
Anyway just my thoughts.