GROW!T Clay Pebbles.Enhance the growth of your plants with Hydrofarm GROW!T 4mm-16mm Clay Pebbles. These premium quality clay pebbles are perfect for hydroponic systems, and can also be used as a top layer for potted plants. Made from 100% natural clay, they provide excellent aeration and drainage, promoting healthy root growth. With a brand name like Hydrofarm, you can trust that you are getting a high-quality product that will enhance the growth and yield of your plants. Whether you are an experienced gardener or just starting out, these clay pebbles are a must-have for any hydroponic or potted plant system. So, get ready to take your gardening game to the next level with Hydrofarm GROW!T 4mm-16mm Clay Pebbles - 10L.