Soil drenching might work...but it did not work for me. My logic as to why is: seldom is the grow medium 100% saturated when the container is "drenched", ergo RAs probably will not be 100% eradicated; but if the grow medium in a 5 gallon container is saturated (bottom first) for 20 minutes or so...100% saturation is almost certain (eradication of RAs is all but guaranteed).