I have a few old boxes that I've converted over to swarm traps, 10-frame mediums, 8-frame mediums that I'm going to double up on, and maybe a deep that a friend is going to retire. I also have a few old frames of old brood comb that is as dark as the pit of despair.
My question is: How empty do you leave your swarm trap? Do you only put a few frames of foundation along with the brood comb and swarm lure and leave the rest of the box empty?
Or, do you fill the box with frames - undrawn foundation along with the old brood comb and lure?