Last year my hives died from mites. This year I got nucs and installed them into the hives with drawn comb. How long do I wait to put on the second brood box? I know they say with foundation when it's 80%, but these are already drawn comb. The outer frames were left over honey frames. The rest were empty brood frames. I have a top feeder on with 1:1 and put some pollen patties in.