To Stimulate natural tropical water in your aquarium. Ultra Black water conditioner contains natural leaf extract that create more natural environment similar to part of the amazon river. This Black water significantly reduces stress and reverses stress induced problems which also helps promote spawning, colouration, activeness as well as to resist diseases. This product is ideal for all soft water fish such as, Angels, neons, barbs, discus, arowana, stringrays,catfish, and even pleco which helps improve colour and vigour of both fish and aquatic plants.