vidaXL Black Basalt Gravel Aquarium Substrate - Natural, Decorative, Trace Element Rich, Versatile Use, 5-8 mm Size, 25 kg Bag

【Decorative Appeal】: The dark shade of black basalt creates impressive contrasts in the aquarium, presenting a visually appealing underwater landscape 【Versatile Use】: Ideal for aquariums with timid fish preferring dark substrates, yet also suitable for gardens, pathways and other landscapes 【Black Basalt Substrate Specification】: Comes in black colour, made from basalt gravel, with 5-8 mm sized chippings, weighing 25 kg per bag 【Natural & Safe】: This Basalt Gravel is 100% natural, no artificial additives or coatings, behaving in a water-neutral way in your aquarium 【Plant Growth Benefits】: With rich trace elements, this basalt substrate encourages strong rooting and rapid growth of your aquarium plants