Makes downward migration even easier (https://www.youtube.com/watch?v=SHhp1WgRHAw). Worms crawl right through the mesh leaving worm-free vermicompost ready to use in your garden.
Prepare new bedding, lay the filter on top, pile on worm-filled compost, let the worms move down away from the light, scrape off the top inch, wait fifteen minutes, and repeat scraping. This is just the typical light extraction harvest, but better because the worms have a place to go.
Each kit includes two filters for different sized worm bins. Red is 18″x32″. Green is 24″x32″. I use the spare filter to keep a fluffy cover layer of newspaper on top of a growing bin.