Colorado sand is to know mother nature is to her smallest creations. We recreate the natural eco-system in our aquarium, which leads to a better understanding of the global environment. Colorado sand is natural sand, suitable for cosmetic sand of general aquarium tanks & planted aquariums, reddish color sand makes an atmosphere of natural river bed inside the aquarium. It is also possible to use it in various ways such as a thin layer of base sand for wabi-kusa layout tank.