LECA clay balls that expand when you soak them in water. They're great as a medium for plants to grow in because it makes watering your plants much easier, you reduce the risks of getting pests, and you can easily "check-in" on your plants. LECA added into soil will help to improve soil aeration and drainage while also retaining water. So, if you want to use these awesome clay pebbles get it now from our store available in half kg packets