Balacoo Lava Rocks Volcanic Lava Stones Decorative Rocks Fish Tank Filter Material 450G Aquarium Landscape Ornaments Decoration 3~6Cm

DescriptionThis is a set of 450g volcanic rocks for water tank. It is able to absorb harmful waste to keep the water tank in stable condition. Can be used as filter material for drinking water and feeding water can store out of trace elements oxygen water balance.Features- Color: As shown.- Material: Volcanic rocks.- Size: About 6x6x6cm.Package Including1 x Bag of Volcanic rocks