Product: AquariumLine Import Gravelit 3 liters
General technical information:
Gravelit looks like a compound very light, like expanded clay [rather reminiscent of the puffed rice], but of smaller size, very porous and light colored.
Unlike clay expands, it floats, and is therefore indicated in the preparation of growing medium, not only in the aquarium, often being used in nurseries for the preparation of the beds of crop sowing or post mold growth.
Technically it is a material that in some way can be considered as the "poor cousin" of other, more noble materials.