Carib Sea Arag-Alive Substrate Special Grade Reef Sand, 10 lb | Instant Cycling & Biological Filtration

Overview

Bring the world’s most exotic reef environments into your home with Carib Sea Arag-Alive Substrate Special Grade Reef Sand. This 10 lb bag is crafted in collaboration with public aquariums and zoological parks, delivering an authentic look and a biology-forward foundation for both reef and freshwater setups. The fine-grained, natural-feel sand helps create a realistic bed that supports a thriving microbial community from day one.

The substrate delivers on two key fronts. First, it contains millions of beneficial marine bacteria per pound, engineered to dramatically improve biological filtration in closed systems. Second, it works toward a stable environment by supporting pH balance and reducing conditions that fuel nuisance algae. The result is a substrate that helps establish a ready-to-live-in microcosm without heavy chemical intervention.

Infinite possibilities, instant potential

Arag-Alive is designed for versatility. In addition to reef tanks, it may be used in marine and African cichlid setups, as well as many freshwater aquariums. You can pair it with discus, tetras, angelfish, water turtles, rays, plants, and other compatible species, all while enjoying a natural-looking base.

Why it matters

• May also be used in marine or African cichlid aquariums
• Contains millions of beneficial marine bacteria to enhance biological filtration
• Ideal for most freshwater aquaria, including discus, tetras, angelfish, water turtles, rays, plants, cichlids and more

What you gain

Beyond rapid cycling, Arag-Alive supports a stable microflora that can help curb algae growth and contribute to a calmer, more natural aquarium ambiance. Independent lab testing notes faster cycling relative to some competing products, though results may vary by setup and maintenance routine.

Key benefits at a glance

• Instantly starts the cycling process in many setups
• Boosts biological filtration with millions of bacteria per pound
• Helps maintain stable pH without constant chemical dosing
• Reduces nuisances associated with new tank conditions

Practical notes

Each 10 lb bag provides a broad substrate option for a range of tank sizes and configurations, helping you achieve a natural look while supporting a healthy, balanced ecosystem. Use as the main substrate or as a foundational layer to enhance bottom-dwelling comfort and overall tank aesthetics.