With our sandy soils here in Florida, we don't have much use for aeration, at least not in St. Augustinegrass. However, soil can get very compacted in heavy traffic areas or areas that are continuously wet. What is the best (quickest, cheapest) way to aerate/loosen soil in small areas? Shovel? Gypsum(don't think we have much clay here)? Spiked Shoes? Do they sell a manual aeration tool?