TANK,VASES,TERRARIUM 1 LB Model: 505505 $49 Natural Black Pebbles These small rocks (0.4~0.8 inches) are perfect for decorations rocks, rocks for plants, and pebbles for indoor plants. Multi-Use for Plants & Aquariums Great as rocks for plants indoor, pebbles for plants indoor, or aquarium gravel (rinse 3x before aquarium use). Enhances Drainage & Aesthetics Use these river rocks for pot drainage, top dressing, or as black rocks for decorative accents. Durable & All-Natural Made from natural stone, these black pebbles are long-lasting and safe for plants and fish tanks. Multi-Pack Options - Available in 1lb/5lb/10lb/18 lb bags for small to large projects