Red Flint Gravel (4.8-9.5 mm / 3/8” x 3/16") - 50lb Bag

Red Flint sand substrate is naturally occurring in the rivers and streams in nature. This enables familiar environments where sand is needed with your fish species that are not accustom to fast moving rivers that might include larger stones. Sand also closes the space between the particles more-so limiting the debris buildup that inevitably leads to breaking down organics over time which increases nitrates and phosphate and can lower water quality. When debris is on top of the substrate its easy to remove and less time in cleaning. North America's Best Aquarium Substrate Red Flint Aquarium Substrate Product line and our Filtration Sands & Gravels have been key material components in large aquariums and zoo’s in North America and Globally. Our unique physical properties including very low acid solubility and naturally clean particles create the perfect solution to your substrate and filtration needs. Whether your project is a small in home aquarium or a large commercial display at a