While both options are effective, liquid aeration covers 100% of a yard and makes larger pore spaces for air, water, and nutrients to flow. It also removes sodium from the soil. Core aeration does not last as long as liquid and only impacts 3-5% of the yard. It does break up the soil by pulling plugs of soil from your lawn to allow air, water, and proper nutrients to seep down beneath the grassroots. When you contact our local lawn care company, we'll take a look at your lawn and suggest the best course of action.