Lava rocks are great rocks for your aquarium, scape or even for planting succulents on them. The strongly structured surface allows succulent plants, such as Mexican pinguicula, to take root in the stone in the best possible way and to find a strong hold.
Large = a large stone (15-30 cm)
Note: Since lava stones are a natural product, the shape, colour and, above all, the size of the stones can vary more widely from one another.