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Re:queen runs out of room in the bottom brood boxes your bees will "swarm" and find a bigger house.Not so, the colony only swarms when a new Queen emerges in the Hive. It is the original Queen that goes off leaving the new queen in the hive.
also ants will not cross vaseline so put a blob on table legs or whereever else you want to stop ants getting to
Re:'If the queen runs out of room in the bottom brood boxes your bees will "swarm" and find a bigger house.'Swarm occurs if new Queen emergies in the hive, to prevent take sealed Queen cell out with a few workers and place in a nursery hive. You can also add a brood box if all frames are carrying sealed lava. Then when 2nd brood box populated, develop new queeen and split hive = extra hive