Seachem Onyx Sand Onyx Sand is a naturally dark gray sand that perfectly complements and enhances the appearance of any aquarium. It supports optimal KH levels for freshwater planted aquariums. Although ideally suited to planted aquaria, it may be used in any aquarium environment. Onyx Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Onyx Sand is not chemically coated or treated, and as a carbonate rich sand, it has a slight buffering capacity that may raise pH by 0.1 – 0.5 pH units (depending on source water characteristics). Onyx Sand is good for the life of the aquarium and need not be replaced.Set-upAlthough it is pre-washed, because Onyx Sand is a natural product, it may become dusty in transit and require rinsing before use to remove any residual dust.When adding water to aquarium, fill slowly to avoid disturbing Onyx Sand substrate bed. Place a bowl in the aquarium and add water directly to the bowl, allowing water to overflow softly on to the gravel bed. Initial cloudiness is normal. To remove cloudiness, use mechanical filtration (such as filter floss). Use Clarity to accelerate clearing. Seachem Onyx Gravel Onyx is a specially fracted natural substrate for the aquarium. Onyx is suitable for any 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 may be mixed with other gravels or sands such as Onyx Sand. Onyx is not chemically coated or treated but does have a slight buffering capacity. Reviews There are no reviews yet. Be the first to review “-7 kg / 15.4 lbs&3.5 kg / 7.7 lbs” Cancel replyYour email address will not be published. Required fields are marked *Your rating * Rate… Perfect Good Average Not that bad Very poor Your review *Name * Email * Save my name, email, and website in this browser for the next time I comment.
