 Because crushed gravel, you can sprinkle it in between those pieces. It'll kind of pack down and do a pretty good job of filling in that surface. And if it starts to wear away, you just put more in place. If it starts to get weeds that come up through it, you're going to have to treat it with a product like Roundup, which will kill the weed at the root. But that's another sign that the base wasn't solid enough. So I wouldn't panic over it. It's just going to be more of a maintenance headache than most patios would be. But that's how I think we should address it.