The Bestgle Gorgeous Fish Tank Decoration Aquarium Ornament Marbles Tumbled Matte Beach Sea Glass Beads are perfect for any aquarium, vase filler, or home decor. Made of high quality fired glass material, these beads are durable and never fade. The tumbled matte surface and round edges will not hurt your hands or fish, and the glow is avoided because it scares the fish. These beads come in a variety of colors and sizes so you can find the perfect fit for your aquarium or vase.