CaribSea Arag-Alive Aragonite Sand
CS-ARAG20
CaribSea Arag-Alive Aragonite Reef Sand is a 100% aragonite substrate seeded with millions of live bacteria to accelerate aquarium cycling and support biological filtration. The aragonite provides natural buffering capacity...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
CaribSea Arag-Alive Aragonite Reef Sand is a 100% aragonite substrate seeded with millions of live bacteria to accelerate aquarium cycling and support biological filtration. The aragonite provides natural buffering capacity and slowly releases calcium and trace elements, while its high porosity offers extensive surface area for nitrifying bacteria. It comes ready to use with no rinsing required and clears quickly.
Build around the CaribSea Arag-Alive Aragonite Sand.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from rock & sand. Most buyers reading this page should buy the middle column.
Marco Rocks Shelf & Branch Rock (per lb)
CaribSea Arag-Alive Aragonite SandAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.