Sera gravel in dark yellow color is resistant to carbon dioxide and neutral towards water, meaning it has no effect on water parameters and does not change the color of the water. Due to the grain size of 0 - 2 mm, plants can grow excellently. Thanks to the spherical grains, the natural gravel is also suitable for breeding bottom-dwelling fish such as catfish.

Sera gravel in dark yellow color has been evaluated according to DIN 38415-6 / EN ISO 15088 standards by an independent institute, and it has been proven to be free from contaminants. Therefore, it is also suitable for breeding sensitive animals.