AQUAWILD KING is a new series of “royal” substrates for the aquarium. These gravels were made of various minerals extracted from the interior of the earth, which translates into their striking beauty. Due to the chemical indifference of the gravels and the lack of influence on the water parameters, they can be used in any type of aquarium, be it biotope or plant, without fear of lowering the pH or hardening the water. Although the KING gravels have been subjected to a machine-sharp edge reduction process three times, they may still be unpleasant for these fish. We recommend versions of POWDER gravel for lovers of bottom fish.