Flourite Onyx Sand 15.4 lb

Onyx Sand™ is a naturally dark gray, carbonate-rich sand ideal for freshwater planted aquariums but suitable for all setups. It helps maintain KH levels, may slightly raise pH (by 0.1–0.5), and requires no additional gravel modifiers. Long-lasting and uncoated, it works best as a standalone substrate but can be mixed with other gravels.

Setup Instructions:

• Rinse before use due to natural dust.
• Add water slowly using a bowl to avoid disturbing the substrate.
• Initial cloudiness is normal—use mechanical filtration or Clarity™ to clear.