Transform your aquarium with Estes Gravel Special Black. This state-of-the-art non-toxic gravel is designed for smaller tanks including betta habitats and reef tanks, with a clear-coated 0.5 cm diameter for easy placement and optimum appearance. The 100% eco-friendly, dust-free coating helps embed fish and plants while tying your aquarium's interior together. Create a stunning display with Estes Gravel Special Black 5lb.