I have two NUCS that are ready for a 2nd hive body! Shall I add the new deeps to the top or the bottom?
When I put second deep super I put it down. Just now we have in Finland cold summer. Last night it was 8C degrees, however day temperature is 20C.
When you put second super on top, bees need to warm 100% more space. When you put it down, they take into use as they are able.
Now I use terrarium heater in my littel hives and if you put 15W heat cable on the floor, it is safe to put second on the top. With warmer nuc can raise 3 times more brood than narurally warmed.
At spring I allways enlarge hive down wards. Most of Finnish beekeepers enlarge to the top, but their hives are not so big as I have