The colour of this lava rock is natural and non-fading, it may include a variety of different shades of red. Multiple Functions : Lava Rocks are great for fire places, fire pits and provide even distribution of heat and flame. Also suitable for garden landscaping decoration, potted plants, aquariums, water gardens and ponds etc. Great for Plants and Aquariums - The special porous structure can absorb impurities in the fish tank. Lava rocks are also great in soil to retain moisture for plants.Please rinse lava rocks 3-4 times before put in fish tank, but do not rub violently. The colour of lava stone is different under dry and wet conditions.
