Onyx Gravel, 7 kg / 15.4 lbs

DescriptionOnyx is a natural substrate specially fracted for the aquarium. Onyx is suitable for all marine or freshwater environments and is ideally suited for cichlid environments. Onyx is most effective when used alone as an integral substrate bed, but it can be mixed with other gravel or sands such as Onyx sand. Onyx is not chemically coated or treated but it has a slight buffering ability.