<ul><li>A blue aquarium substrate can add a great contrast in colors from other rock or decoration in your tank, blue will really stand out against bogwood and slate rocks.</li><li>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.</li><li>They work as a good biological filter because most of the healthy bacteria grow between them.</li><li>They work as a great part of the decoration.</li><li>These provide a very healthy environment for plant and fishes.</li><li>The minimum 2.5-inch layer of gravels is very important for the healthy aquarium.</li><li>Net Content: 1 Kilo Gram</li></ul>

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