Suitable Size and Number : 5-9mm/3/16-3/8inch,Approximately 430 to 440 units, About 16oz -1 pounds /460g (Fill 0.9 Cup). polished and have a beautiful smooth finish.
FEATURES: Small Aquarium Substrate Gravel,Polished Smooth Fish Tank Gravel,Non fading uncoated vibrant stones, making them safe for fish, animals and plants, and they won’t alter your aquarium’s water chemistry.
Material: Made of polished natural stone, clean, No smell, Every stone is not perforated. They are sturdy and durable and can be used repeatedly.