I have two deeps that I reversed at the end of April, so there was more room in the "bottom deep" for egg-laying. I have recently "reversed the deeps" to their original state, and on my first check, have noticed a lot of frames are "black" in color, and there are fewer bees than I thought would be present. I have checked again, after a week, and the colony is rebuilding (it appears to be slowly) but the bees are clustered on the outside frames of the bottom deep, with almost no bees in the centre of the hive (where the 'black' combs are located...
Should I replace these frames with new foundation?
Should I replace all the 'black comb", frames, with new foundation?
What caused the comb to go black, in the first place?
Any advice would be more than welcome...
Thanking you in Advance,
binglis