If you keep reptiles or amphibians in a bio-active setup, then tropical woodlice are a great and natural way of breaking down waste.
These starter cultures are especially suitable for a natural set up, and can be used to start and build a colony. Both species of woodlouse will eat any type of organic material and in the right bio-active set-up, they will breed prolifically and provide an ongoing food source as well as serving as part of the clean-up gang to consume waste and recycle nutrients.