I got some adults 2 months back (all of which have passed on now) and I just checked the substrate today to find 4 larvae! (there could be more, I only checked the loose part.) My question is; I have both rotting wood and root vegetables in there (yams, potatoes, just added some carrot.) The potato seemed like they ate the inside of it out. Could they possible need the wood too, or can I just remove it and give them all the root veggies they could ever want and need.