I know some people are going through all these extra lengths to separate the different sized worms and beetles, but with my superworms, a bigger version of the mealworm, I throw my beginning worms into a large clear storage container with drilled holes on the lid, and throw in a few large containers of plain uncooked oatmeal, with quartered potatoes. After a couple of weeks they turn into pupa, within a few days they turn into beetles, take a couple days to dry, the breed and lay eggs and die. To feed I would recommend a cheap one dollar scooper reach in pick out potatoes and throw on the ground.