An easy way to determine if your arena is too wet or too dry is by grabbing a handful of your footing. If you grab a handful, squeeze it and open your hand and it crumbles out. It’s a sign that your arena is too dry. If you grab a handful, squeeze it and water runs out. That’s a good sign that your arena is too wet. From there on, you can determine if you need to add water or even let your arena sit for a few days.