【SPECIFICATION】: Material: Premium polished glass sand; Weight: 4.4 lbs (approx. 2000g); Stone size: 0.04-0.12 in (1-3mm) ; Volume: 0.22 gal 【FEATURES】: These vibrant blue, sturdy, and durable polished glass sand boast smooth edges, ensuring no chipped pieces. They're colorfast, uncoated, non-toxic, making them safe for fish, animals and plants, and they won't alter your aquarium's water chemistry 【WATER DECORATION】: These aquarium rocks are shiny in water but don’t glow at dark. Ideal decor for freshwater & saltwater aquariums, betta fish tank, terrariums, gardens, potted plants, vases, crafts, succulent planter, water fountain, birdbath, candle display, bonsai and resin projects, etc 【LANDSCAPE ART DESIGN】: Elevate your artistic vision with these sturdy, colorfast, and sunlit-glistening versatile gravel. Perfect for landscaping fairy gardens, potted plants, gardens, vases, succulent planters, bonsai, diorama project, and more 【QUANTITY CALCULATION & USING TIP】: For a fish tank with length L'' & width W'', you'll need L * W / 23 lbs of these landscaping stones for a 1'' thick stone layer. For example, a 10''x10'' tank requires about 4.35 lbs of stones for a 1'' layer. Please rinse these decorative stone beads with water 3-4 times before putting in a fish tank. Avoid stacking them too high or close to walls to prevent harm to fish ASIN B0C77PM2BH Size 4.4 lbs, 0.04''-0.12''(Mini) Color Blue Glass Sand Brand Name BXI Item Weight 4.42 pounds Manufacturer BXI Item model number BX-US-2blsd Target Audience Keyword fish Item Package Dimensions L x W x H 10.12 x 6.65 x 2.01 inches