Voonline Bio-Active Lava Rocks - Natural Filter Media and Decorative Aquarium Substrate

Experience improved water quality and healthier aquatic life with Voonline Natural Lava Rocks. These versatile rocks serve as both a biological filter media and an eye-catching addition to your aquarium landscape.

Fish safe and easy to incorporate, they offer the perfect environment for beneficial bacteria to thrive. Comes in Black and Red colors.