It's been raining pretty regular this past week and some places in my run are getting muddy. I know that adding sand would help the drainage and it not be so muddy but what type of sand do I need to get? bagged play sand? Or is there something else I could do? I'm going out later and was gonna head by the store to get a few things so I was gonna get something to help with that bud I wasn't sure what to get. Thanks in advance!