Our Canyon Quartz Ecoscape rock is not only an artistic choice for the home aquarium, but also a safe choice for both fish and plants. Canyon Quartz is one of the most common minerals found on the Earth's crust. It is crystalline and thus reacts inertly and will not interfere with water pH or hardness. It comes in a variety of shapes and sizes handpicked by the Ecoscape team to give your aquarium a unique look.