I have heard conflicting advice on the following question. "Can you aerate after crabgrass prevention has been applied?" Some say that aerating will break the "barrier" the product creates in the soil. Others say that research shows that aeration after application has no effect on the effectiveness of the crabgrass preventer. My dilemma: My lawn care guru applied Halts earlier this week before my scheduled aeration later this week. It is raining currently and the Halts is soaking in. If I aerate later this week, will it mess with the Halts? The way I look at it, the Halts hasn;t had time to make a barrier yet and the cores that are pulled will get reabsorbed back into the turf with Halts already in them. Any advice? I hate to reapply since I don't want to over do it and harm my gorgeous KBG. Thanks in advance for any advice!!!