Compost Aerator Tool. Microbes which make good compost need air. So if your heap is too wet or too dry, or if you ft.ve used only grass clippings or leaves, get it cooking with the compost aerator tool. Simply thrust the pointed end into the heap and pull it up so the paddles open out, introducing more air, and the fermentation process will begin again. Plated tubular steel handle. Heavy plated steel paddles. 30 in. long. Ship wt 10#