Dymax Ultra Black Water contains natural leaf extract that create more natural environment, similar to parts of the Amazon river. The black water significantly reduces stress and reverses stress induced problems which also helps promotes spawning, colour, activity and resist diseases. This conditioner is ideal for all soft water fish, including Angel, Neons, Barbs, Discus, Arowana, Stingrays, Catfish and Pleco which helps improve colour and vigour of fish and even for aquatic plants.