I'm just jumping in as well and have not read all the posts. I have one of those tumbeler composters from COSTCO. The kind that spin. I had been filling it for a couple of months when I noticed it was full of large meal worms. No beatles just huge mealies. My mother in law has Avocado trees and brings me lots. Way more then we can eat and alot of them end up in the composter. I think that's where the mealies come from. Anyway just wanted to share and see if anyone else had a similar experience.