Foodie Puppies A colored aquarium substrate can add great contrast in colors from other rocks or decorations in your tank and will really stand out against bogwood and slate rocks. Gravels are one of the most important parts of the aquarium because They keep water fresh and healthy long and long time by absorbing all the waste. They work as a good biological filter because most of the healthy bacteria grow between them. They work as a great part of the decoration. These provide a very healthy environment for plants and fishes. Shining Glow color stones (Sand form) are available in 2.5kg, 5kg, 10kg, 15kg, and 20Kg packs. This aquarium decorative sand will provide a Very Healthy Environment For Plant & Fishes. Empty the sand in a bucket and wash it till all the dirt is out. Then put it in the aquarium. Product color may slightly vary due to photographic lighting sources or your monitor settings. The jar is not included. Quantum Retail - Quartzite sand can be used in Aquariums as aquarium decorative sand, Garden, Rangoli, Kids play Vase filler, Craft, and Decorative Colored Wedding Unity Sand