The quartz sand is a natural product and contains no lime. It is very fine with a grain size of only 0-1mm. It is available in three different colors.
The substrate can consist of either sand, gravel or a mixture of both. The needs of the fish should be taken into account. The gravel should be rounded and have a maximum grain size of 2-3mm. A recommended gravel height is 6-8cm so that the plants can form sufficient roots. Amazonas gravel offers a natural substrate that is suitable for all fish species and their habitat.
You can use the following formula to calculate how much gravel you need for your aquarium: (length x width x gravel height x 1.6) / 1000
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