Elevate your tank’s design with Oceanmax Dark Blue Gravel Fish Tank Substrate Stones. This 1kg bag showcases bold, 3-5mm artificial gravel in deep blue tones, perfect for dramatic aquascapes and contemporary aquarium styles. The substrate’s striking color accentuates the vibrancy of your fish and plants, while its durable construction ensures lasting beauty and easy maintenance, offering a cool, calming ambiance to your aquarium setup.