WIO Inferno Grave S is a gravel for aquariums of natural river that. As its name indicates, its red hues allow you to imagine what it would be like gravel coming from hell but nothing further. This gravel is used in small aquariums and nano-aquariums to endow warmth and make the environment more welcoming for our plants, fish and shrimp. blends very well with some line sands WIO as they are El Dorado, Cimarrón or Tigris.