Sourced from the wild west coast of New Zealand our Iron Sand is rich in iron and other minerals. Formed deep inside the giant volcanoes of New Zealand this sand worked its way down the estuaries and rivers to the ocean. Its iron rich properties will promote exceptional plant growth which till now has only been available using iron additives. Its black shimmering texture is captivating and forms the perfect canvas for accentuating the colours of your fish. Can be used in fresh water and marine aquariums.