CaribSea Arag-Alive! Special Grade Reef Sand – 20 lbs
Bring your reef tank to life with CaribSea Arag-Alive! Special Grade Reef Sand, a premium substrate designed to jumpstart biological filtration and enhance your aquarium’s natural look. Pre-seeded with millions of live beneficial bacteria, this sand helps establish your tank faster by supporting a stable nitrogen cycle from day one.
Key Benefits:
- Pre-Seeded with Live Bacteria
Accelerates biological filtration and shortens the tank cycling process - perfect for new reef setups. - Optimal Grain Size (1.0 - 2.0 mm)
Coarse enough to reduce detritus buildup while still promoting strong water flow and preventing compaction - ideal for reef-safe bottom dwellers. - 100% Natural Aragonite
Rich in calcium and trace elements to support healthy pH and overall coral vitality. - No Rinsing Required
Packaged wet and ready to use straight out of the bag - clouds clear quickly for instant visual clarity. - Flexible for Shallow or Deep Beds
Versatile enough for use in standard substrates, deep sand beds, or plenum systems. Functions as a powerful denitrator in deeper applications.
Whether you're starting a new system or upgrading your substrate, CaribSea’s Special Grade Arag-Alive! Sand delivers both form & function - supporting your reef’s biology while adding a clean, natural aesthetic.
Weight: 20 lbs
Grain Size: 1.0 – 2.0 mm
Composition: 100% aragonite
Ideal For: Reef aquariums, deep sand beds, plenum filtration systems
Need help calculating how much sand you need for your tank size?
Reach out to the Tidalwave team - we’ll help you dial in the perfect substrate depth.
We totally understand that plans change! You can modify or cancel your order as long as it hasn’t been shipped yet. Just call or email us right away - our team will confirm if we can catch it before it leaves our facility.
If your order is already in transit, you’ll need to request a return once it arrives. Keep in mind that some items, like aquariums and livestock, can’t be returned.
For full terms, please refer to our Refund & Return Policy.
Placing an order is simple - just add your item to the cart & complete the checkout process online. Once your order is confirmed, we'll reach out to you directly to schedule a local pick-up appointment at our facility.
* All local pick-ups are by appointment only *
Order processing typically takes 1-2 business days for products that are in stock or readily available through our network of distributors. Some products, however, are fulfilled on demand directly from our distributors, which can slightly extend processing and delivery times depending on availability and location.
Rest assured - we always work to get your order shipped as quickly as possible.
If you’d like to confirm availability or request an ETA before placing your order, you’re always welcome to call or email us.

