20 lb. Special Grade Arag-Alive! Reef Sand

In stock

- +

Why does BRS recommend this?

When we at Bulk Reef Supply set up a tank that we know will have large amounts of flow our instant choice for sand is the Arag-Alive Special Grade Sand from CaribSea.  With its larger particle size, it does not get pushed around like most other smaller grain sand sizes available and is great for all tanks especially those with a lot of water movement.


Special Grage Arag-Alive! Live Aragonite Reef Sand contains millions of live bacteria to create a natural biological balance in your reef tank.

  • Contains live bacteria to assist with a faster cycle
  • Grain size: 1-2mm
  • High Surface Area for Bacteria


BRS suggests 1 pound of sand per 2 gallons of display tank volume on average


Caribsea's Arag-Alive! Live Reef Sand is a great choice for new aquarists and new reef tank setups. Arag-Alive sands clear quickly and contain millions of live bacteria, speeding up your tanks cycle and leading to less nuisance algae.


Selecting the right sand: When choosing the right sand for your tank, it is important to keep a few things in mind.

How much flow will be in the tank?
Aquariums with high amounts of water movement will require sand with a larger grain size. Smaller particles can be blown around easily.

What kind of inhabitants will you be keeping?
Many species do require particular types of sand, like gobies, jawfish, and wrasses. Fish and invertebrates that like to burrow or sift through the sand will do best with smaller particle sizes.

Will it be for a refugium or deep sandbed?
Sand that will be used for filtration or refugium, we suggest using smaller particles that will give bacteria more surface area to grow and thrive on.

How much sand do I need?

Below is a table of common tank sizes and how many pounds of Special Grade Sand is required to achieve a certain depth. Results may vary depending on the aquascaping in your tank, overflow styles, and the specific tank manufacturer. We always recommend getting a little extra sand to make sure you have enough on hand when you are filling your tank. 


Gallons Dimension 1" Depth 2" Depth 3" Depth
10 Gallon 20x10x12 9.7 lbs 19.4 lbs 29.2 lbs
20 Gallon 24x12x16 14.0 lbs 28.0 lbs 42.0 lbs
29 Gallon 30x12x18 17.5 lbs 35.0 lbs 52.5 lbs
30 Gallon 36x13x16 22.8 lbs 45.5 lbs 68.3 lbs
40 Gallon 36x18x16 31.5 lbs 63.0 lbs 94.5 lbs
55 Gallon 48x13x20 29.7 lbs 59.4 lbs 89.1 lbs
75 Gallon 48x18x21 41.1 lbs 82.3 lbs 123.4 lbs
90 Gallon 48x18x24 41.1 lbs 82.3 lbs 123.4 lbs
120 Gallon 48x24x24 54.8 lbs 109.7 lbs 164.5 lbs
180 Gallon 72x24x24 84.0 lbs 168.0 lbs 252.0 lbs
220 Gallon 72x24x30 84.0 lbs 168.0 lbs 252.0 lbs
300 Gallon 72x36x27 126.0 lbs 252.0 lbs 378.0 lbs


Sand Type Grain Sizes (mm) Average Density
Fiji Pink 0.5 - 1.5 90lbs per cubic foot
Special Grade 1.0 - 2.0 85lbs per cubic foot
Bahamas Oolite 0.25 - 1.0 96lbs per cubic foot
Indo-Pacific Black 0.25 - 5.0 90lbs per cubic foot
West Caribbean Reef 1.0 - 5.0 90lbs per cubic foot
Hawaiian Black 0.25 - 3.5 80lbs per cubic foot
Bimini Pink 0.5 - 5.0 90lbs per cubic foot
Natural Reef 3.0 - 5.5 85lbs per cubic foot
Florida Crushed Coral 3.0 - 5.5 72lbs per cubic foot
More Information
UPC 008479007902
Write Your Own Review
You're reviewing:20 lb. Special Grade Arag-Alive! Reef Sand
Your Rating
Only registered users can write reviews. Please or

Product Questions

I currently have a 120 gal established tank and am moving to a new 210 Gal tank. The 120 gal tank has Bahamas Oolite. Would you recommending against mixing the existing sand with the Special Grade in the new tank to save money?
Question by: Chip Kunecki on Feb 15, 2024, 4:43 PM
Hey there,
Thank you for reaching out to us. Good question. As long as your current systems has no issues then why not. I have done this a few times with the same intentions to save money. Please let me know if you need anything further.
Answer by: Thomas Wofle (BRS Staff) on Feb 19, 2024, 8:13 AM
i was going to get this sand to work at replacing some old sand in my established aquarium. but is there a better way to go for that? should i do dry sand?
Question by: jill horst on Jan 10, 2024, 6:46 PM
Hey there,
Thank you for reaching out to us. As with any replacement sand used there will be the water sand cloud when first used. But will settle in time. So the choice is up too you. I prefer the 20 lb. Special Grade Arag-Alive! Reef Sand .Please let me know if you need anything further.
Answer by: Thomas Wofle (BRS Staff) on Feb 7, 2024, 12:31 PM
Because this is live sand: does it have a timeframe from purchase that it is no longer recommended for use?
Question by: Edward Brown on Dec 14, 2023, 3:48 AM
It is recommended to use live sand within 2 years of the manufacturing date.
Answer by: Laura (BRS Staff) on Feb 7, 2024, 10:54 AM
Is this sand fine enough for a sand shifting goby?
Question by: Andrew Dunaway on Apr 27, 2022, 10:54 PM
Hey there,
Thank you for reaching out to us. Yes, this sand is fine for a sand sifting goby.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Apr 28, 2022, 8:01 AM
Can this sand be added to an established tank that already has live sand?
Question by: Gary Fletcher on Sep 11, 2020, 3:16 PM
Yes, it can. Just do so slowly.
Answer by: Matt Lucero (BRS Staff) on Nov 5, 2021, 9:45 AM