When you add your pet poop and carbon material to the Subpod, you'll need to mix them through using an aerator. This takes less than a minute each time you feed the worms. If the soil surrounding Subpod settles and starts to reveal the Subpod wormholes (beneath the airflow panels), more soil (and mulch) needs to be added to cover the holes. Otherwise, just keep feeding your worms and keep the blanket moist when you are adding more poop.