I am using 3 as of now. Some time the queen will keep coming up,up,up. I will put one on then. If the queen stays down I don't use one. So far I can't tell any difference. But most time I have an entrance hole in my supers somewhere above the brood. I don't mind putting holes in, it also helps vent. I buy some 2nd's and reject boxes just to get the knot holes :roll: then I don't have to cut them. I found out if the bees don't want a hole up there they will stop it up.
I told about my "Last week" in march swarm.
Well I have got to add another box tomorrow, That makes 6 supers off that one, If they fill it.
So far, 3 ten frame medium, one 8 frame deep and the 8 frame medium. The mother hive this swarm came from has done 4 and I added the fith to it today.
Have honey running out my ears. ;)
doak