I recently made 5 frame deep nucs for the first time. They filled the 5 deep frames and I'm concerned that they maybe getting crowded, so I decided to add a medium supper on top of the nuc. I want them to build up enough stores for the winter so I installed a frame feeder in with the 3 medium frames on the super so they could draw it out and fill it. The question I have is when they finish drawing out the 3 medium frames and filled it, should I remove the feeder and replace it with 2 more empty frames? Or should I leave the feeder in there empty to refill in spring?