Dymax Ultra Black Water is a specialized water conditioner designed to mimic the natural habitat of softwater fish found in parts of the Amazon River. It contains natural leaf extracts that replicate the unique chemical and biological properties of these waters, providing a more authentic environment for various species such as Angels, Neon Tetras, Barbs, Discus, Arowana, Stingrays, Catfish, and Pleco. By reducing stress levels, this conditioner helps to promote spawning behavior, vibrant colors, increased activity, and enhanced disease resistance in fish. It is available in two convenient sizes: 300mm and 500mm.