I haven't seen a thread on these and thought I would pipe in. I bought a BioPod and have been putting food scraps in for the last month. Now, every evening I'm going out and finding a cup or so of grubs. My Chams and Beardies love them. If you have not explored these feeders, I highly recommend them. You can buy them commercially, they are called Phoenix worms on the market.

The great thing about them is after you invest in the BioPod, they are free! Scrap food attracts the Black Soldier Fly (which does not even have a mouth and are completely harmless). The Soldier fly drives out typical flies and if you have too many grubs, the birds and fish love them too.

Here is a pic of my harvest tonight: