Re: best way to 2:1 feed in-hive?
There are two ways to feed syrup in-hive that are effective. One is with jars or cans with small holes punched in the lid. Invert a jar/can over the frames onto two small sticks of wood and put an empty super with cover on top. The disadvantage of feeding this way is that temperature changes can cause the syrup to flood the bees.
The other way is with a container, usually a tray or pan that the bees can take up the feed from. These work best if floats or other means are used to keep the bees from drowning.
I've used the bag feeders that go over a frame and found them to be a waste of time. I've used the frame feeders which replace a frame and found that they don't really contain enough syrup to do much good. It is usually best to feed about a gallon of syrup at a time.
The other effective way to feed in winter is with dry sugar on a sheet of newspaper above the cluster. If the bees run out of honey they will feed on the sugar to keep themselves alive.
NW Alabama, 50 years, 20 colonies and growing, sideliner, treatment free since 2005, 14 frame square Dadant broodnest