Decorative aquarium gravel is the ideal way to enhance the appearance of you fish tank. Made from silica aggregates known for their inert properties & coated in a colourfast resin for trouble free fish keeping, this gravel is suitable for all types of aquarium set-ups including coldwater, tropical & saltwater, & is also the perfect planting medium due to its finer size. Suitable for bottom feeders & barbed fish, it will not change the PH of the water.