biOrb Décor Sets are themed collections of some of our favorite pieces, bundled together to make decorating your aquarium easy. Each décor set includes a Samuel Baker sculpture, plants, and other aesthetically pleasing decorations that make it effortless to beautify your biOrb. The biOrb Winter Décor Set is a perfect example, featuring a holly tree sculpture, white sea lily, white sea urchin set, and green moss pebble set. The durable ceramic resin blend sculpture effortlessly slides over the biOrb bubble tube, instantly becoming a striking centerpiece. The fish-friendly plants are designed with smooth weighted ball bases that seamlessly blend in with the biOrb ceramic media. The sea urchin set includes three detailed replicas of varying size. Additionally, the faux moss pebbles decorate the bottom of the aquarium. The materials used to create our décor are non-toxic, easy to clean, and durable. These elements come together to create a festive winter scape within any 4-gallon (15 L) biOrb aquarium. Furthermore, all biOrb decorations are compatible with both freshwater and saltwater aquarium setups. So, you can create your dream underwater oasis regardless of the type of aquatic environment you prefer.