Sera Gravel Anthracite is a natural, high-quality gravel for freshwater and marine aquariums. This CO2-proof gravel has a neutral effect on water parameters, ensuring it won’t alter the water's pH or tint it. Its 1-3 mm grain size supports healthy plant growth, while its round grains make it ideal for bottom-dwelling fish like catfish. Proven to be free from pollutants, it’s safe for sensitive aquatic species and supports a healthy aquatic environment.

Key Features:

• Grain size: 1 - 3 mm, perfect for plant growth
• Neutral water impact: Does not affect water parameters or tint the water
• CO2-proof: Supports a stable aquatic environment
• Round grains: Ideal for bottom-dwelling fish, such as catfish
• Pollutant-free: Certified by independent institutes for safety
• Sizes available: 3L (3.2 US qt) and 6L (1.6 US gal) packs