Realistic Decoration: The shiny kelp ornament can dance with the slightest movement of water, which can increase visual appeal. Safe for your fish: Made of eco-friendly soft silicone. Lightweight, colorfast, non-toxic, odorless and durable. Does not light: The glowing effect will only occur under actinic lighting and we recommend blue or purple light. Easy to use: Maintenance free and decorating your aquarium all the time. The silicone base bears some weight which can keep the kelp stable in the aquarium. Dimensions: 2.2’‘W x 7’‘H; weighs 1.1 oz.