Available in 2 different packing size: 3.5kg/size S, 7kg/size M

• Premium natural sand for the planted aquarium
• Allows beneficial bacteria to colonise and provide bio filtration
• Supports optimal KH levels for freshwater planted aquariums
• Rich in carbonates

Onyx Sand is a natural substrate for planted aquarium. It is a beautiful gravel that enables beneficial bacteria to colonise and provide bio filtration.

ADVANTAGES

Gravel is one of the most important elements of an aquarium. The gravel serves as a home for beneficial bacteria. As bacterial colonise the substrate, natural bio filtration takes place within the substrate as the bacteria breaks down organic wastes, leftover food, and plant debris. This helps to keep the water clean and safe for your fish and plants.

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-UP

Although it is pre-washed, because Onyx Sand Black 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 Black 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.