NOQ1014: Features: -Aquarium sand. -Available in 0.5-1.5mm and 1.2-1.7mm grain sizes. -100% From the ocean floor. -Color: Pink. -Increases carbonate hardness. -Extremely high surface area filter media. -Denitrifying anaerobic beds. -Ideal for reef system tank bottoms. -Reduces nitrates. -Maintain pH. -Provide marine trace elements. -Heat sterilized. -Ideal for culturing live sand. -Packaged 2 / 20 lbs bags per case. -Made in United States. -Dimensions: 22 H x 12 W x 2 D. Recommended Use: -Use at a rate of 10 lbs per square foot of the tank floor's bottom area which yields about a 1 deep covering. Depending on your needs or preferences the depth may vary from 1/8 to 3 s of covering.