The UNS Bio Block is a premium type of filter media that supports improved filtration. Its surface area is ideal for the colonization of beneficial bacteria. Beneficial bacteria plays a vital role in biological filtration and is typically referenced when determining whether or not the aquarium is cycled and established. This type of bacteria breaks down and converts harmful components into less toxic nitrates, resulting in a healthier and more balanced ecosystem for aquarium fish and plants. Key Features and Important Notes Compact Design: UNS Bio Blocks are compact in size and can be added to a wide range of aquarium filter units. They are designed to be stacked and require a small amount of space to be utilized. Product Specifications Dimensions (LxWxH): 2.75 x 1.18 x 0.78" What's Included UNS Bio Block - 3 blocks per order
