Glamour Stone has an artificial shell and should therefore only be rinsed briefly with cold water before use. Do not wash the gravel with warm water or water that is warmer than the aquarium water. It is pH-neutral and uses a special resin, does not release any substances into the water, and is guaranteed to be non-toxic. The gravel meets the requirements of DIN EN 71 and can therefore be considered non-toxic. These trendy Glamour Stones allow you to find the right color for your aquarium. Whether you prefer natural colors or something more cheerful, everything is possible with Aqua D'ella Glamour Stones.