Marine Substrates

Caribsea Aragalive


You can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public aquariums and zoological parks where authenticity is a must, Arag-Alive!™ makes any aquarium uniquely yours. Arag-Alive!™ makes it easy to set up an aquarium. It’s ready to work, clears quickly, and contains millions of live bacteria to cycle super fast and create a natural biological balance. Arag-Alive!™ suppresses the dreaded “new tank syndrome”, compresses the ammonia cycle, and discourages nuisance algae. In fact, independent labs prove Arag-Alive!™ cycles days faster than other brands of live sand. That’s what makes Arag-Alive!™ the choice of new aquarists and maintenance companies where speed of set up, beauty, and reliability are demanded.

In an ongoing effort to improve Arag-Alive and increase ease of use, the Bio-Magnet Clarifier is no longer in a packet inside the bag. Bio-Magnet Clarifier is now added directly to the packing solution. This will eliminate looking through the substrate for a packet and makes Arag-Alive even easier to use.

Aragonite Special Grade Reef

Special Grade Reef

Typical Size: 1.0 – 2.0mm
Average Density: 85 pounds per cubic foot
Item: 01790, 10 lb; 00790, 20 lb

Aragonite Oolite

Bahamas Oolite

Typical Size: 0.25 – 1.0mm
Average Density: 96 pounds per cubic foot
Item: 01793, 10 lb; 00793, 20 lb

Aragalive Hawaiian Black

Hawaiian Black

Typical Size: 0.25 – 3.5mm
Average Density: 80 pounds per cubic foot
Item: 01797, 10 lb; 00797, 20 lb

Aragalive Fiji Pink

Fiji Pink

Typical Size: 0.5 – 1.5mm
Average Density: 90 pounds per cubic foot
Item: 01792, 10 lb; 00792, 20 lb

AragAlive Bimini Pink

Bimini Pink

Typical Size: 0.5 – 5.0mm
Average Density: 90 pounds per cubic foot
Item: 01796, 10 lb; 00796, 20 lb 

AragAlive Natural Reef

Natural Reef

Typical Size: 3.0 – 5.5mm
Average Density: 85 pounds per cubic foot
Item: 01799, 8 lb; 00799, 16 lb


Caribsea Araganite


Aragonite Blend Substrates – Recognized globally for their purity and precision. Our substrates are purposely engineered and free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates.

Aragalive Fiji Pink

Fiji Pink

Typical Size: 0.5 – 1.5mm
Average Density: 90 pounds per cubic foot
Item: 00022, 15 lb; 00052, 40 lb

Aragonite Oolite

Aragamax™ Sugar-Sized Sand

Typical Size: 0.25 – 1.0mm
Average Density: 96 pounds per cubic foot
Item: 00930, 30 lb

Aragonite Special Grade Reef

Special Grade Reef Sand

Typical Size: 1.0 – 2.0mm
Average Density: 85 pounds per cubic foot
Item: 00020, 15 lb; 00050, 40 lb

Aragonite Special Grade Reef

AragaMax™ Select

Typical Size: 0.5 – 1.5mm
Average Density: 90 pounds per cubic foot
Item: 00025, 15 lb; 00932, 30 lb

Florida Crushed Coral

Florida Crushed Coral

Typical Size: 2.5 – 5.5mm
Average Density: 72 pounds per cubic foot
Item: 00110, 10 lb; 00120, 15 lb; 00150, 40 lb

Colaline Bag 2023CORALINE™

CORALINE™ – Natural dramatic colors and textures combined with pH support characterize our CORALINE™ and Seaflor™ products. These are coarser materials suitable for most undergravel filtration and fish systems or as an accent for finer sands anywhere where elevated pH values are desirable. Consider the CORALINE™ products in brackish or Cichlid aquariums (Central American or African). Seaflor™ Puka Shell substrates are great additions to fine sands in reef tanks where animals make their homes by burrowing in the substrate. Jawfish, blennies and burrowing crustaceans will especially appreciate the extra “construction material.” Our substrates are purposely engineered and free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates. Precision grading makes system design a breeze!

CORALine Caribbean Crushed

Caribbean Crushed Coral

Typical Size: 3.0 – 6.0mm
Average Density: 72 pounds per cubic foot
Item: 00141, 40 lb

Colaline Sample 2023 B


Typical Size: 3-8 mm
Average Density: 75 lbs per cubic foot
Item: 00101, 20 lb

Caribsea Ocean DirectOCEAN DIRECT™

This substrate is different than all other live sand products on the market. Ocean Direct™ utilizes “Sea Breathe” technology, which preserves real live sand with its own original bacteria. Every breathable bag of Ocean Direct™ is alive with up to 1000 times more beneficial bacteria than other preservation methods. Every grain of Ocean Direct™ is coated with bacteria and encapsulated by capillary action in a thin film of real ocean water. The thin film is open to the atmosphere for unparalleled gas exchange. This results in high counts of natural and beneficial bacteria with no noxious buildup of metabolic by‑products. Ocean Direct™ provides you with a thriving, natural aquarium in minutes!

Aragonite Oolite


Typical Size: 0.25 – 1.0mm
Average Density: 96 pounds per cubic foot
Item: 01905, 5 lb; 01920, 20 lb; 01940, 40 lb

Oceandirect Original

Original Grade

Typical Size: 0.25 – 6.5mm
Average Density: 87 pounds per cubic foot
Item: 00905, 5 lb; 00920, 20 lb; 00940, 20 lb

Aquaculture Gravel

Our new aquaculture gravel is a white, porous, well graded calcite (calcium carbonate) approximately ½ to 3/8 inch diameter. This product is ideal where flow rates are important, such as deep beds, reverse flow, and trickle through filtration. An ideal platform for water purifying bacteria plus provides pH support and calcium input. Excellent media for many commercial applications such as lobster holding facilities, shark tanks, etc.

Aquaculture Gravel

Typical Size: ½ to 3/8 inch diameter
Item: 00156, 40 lb

Marine Rocks



LifeRock™ begins as a sunlit piece of Pleistocene era seafloor thriving with living creatures. Over the next 100 millennia and the retreat of the ocean, this ancient piece of seafloor, now well inland, has formed a pure, aragonite-bearing rock. This clean base rock is 97% calcium carbonate with minor and trace elements such as strontium, magnesium, and barium.  This base has an amazing 50% void space which will provide residence for billions of water-purifying bacteria.  LifeRock™ is infused with bacteria using AragAlive™ technology which results in a reduction of traditional cycling times.  Each piece of LifeRock™ has multiple engineered aragonite coatings that not only maintain the extensive macro-and micro- porosity but yield the soft muted colors of a living reef.  LifeRock™ is a superior rock of true marine origin without hitchhikers, organics, or algae.  No curing is required.  With LifeRock™ you will get the look of an established reef from Day 1.

Now go Build Your Ocean™!

Life Rock Dr D Reef

Caribsea Life Rock LifeRock


10 lb Box Product #10376
40 lb Box Product #00376
20 lb Box Product #25376

Branches 2022

Belize Branch

20 lb Box Product #00384

Are you looking to take your scape to the next level? New Ultimate Shelf Rock and Ultimate Branch Clusters are the perfect accents for any reef or fish tank. Ultimate Shelves make spectacular platforms for coral placement or for creating reef ledges. Ultimate Branch Clusters mimic craggy, dramatic back reef zones and make for an exciting swim/hide area for fish. Or simply add more height to your reef without starting from scratch.

Fancy Branch Clusters

LifeRock™ Ultimate Branch Clusters

2 pack #10384

Liferock Premium Shelf Rock

LifeRock™ Ultimate Shelf

20 lb Box Product #00312

LifeRock™ Dreamscapes Assortment Box

This box has everything you need to make a beautiful aquascape and there are so many ways to arrange them.  Also, each box has a minimum of 40 pounds of rock that include

  • 2 x 12” Arches
  • 15 lbs Original Rock
  • 3 Ledges
  • 1 donut
  • 1 cave
  • 1 Fancy Branch Cluster
  • 1 Jar Rock Lock Aquascaping Cement

We suggest using one box for every 40 to 60 gallons.

Liferock Dreamscapes Assortment Box

40 lb Box Product #00392

00309 Ledges


Product #00309

00313 Nano Tree

Nano Tree

 Product #00313

00311 Nano Arch And Rocks Kit

Nano Reef Kit- 2 Nano Arches plus small Original

 Product #00311

00315 10lb Nano Box

Nano Rock Original

10lb Product #00315


OG Coral Trees and Shrooms™

Tree (left) (16 inch height) Product # 00369
Shroom™ (right) (12 inch height) Product #00367

Liferock Reef Tree And Arches

Reef Tree with Arches™

Product #00358

Coral Tree Kit

Coral Tree Kit

Approximate height 20 inches #00361

Reef Tree Extension Kit

Tree Extension Kit

Add another 5 inches or so of height to your Reef Tree



New 18” arch is the most versatile arch yet!

XL (24 inch) Product # 00396
Large (18 inch) Product # 00318
Original (12 inch)  Product # 00389
Nano Arch (8 inch) Product # 00356

Liferock Mega Arch 36 Inch Item 00397

Mega Arch (36 inch)

Product # 00397

Caribsea Life Rock LifeRock

Shapes (Arches and tunnels)

Each box contains:  2 x 12” arches with frag holes, 1 x original cave, and 1 donut

20 lb Box Product # 00381

Mega Cave


Mega Cave (Approx 14 inches) Product # 00398
Original (Approx 9 inches)  Product # 00344

Liferock Large Shelf

LifeRock™ Shelf 21”

Product #00317

Caribsea Life Rock LifeRock Shelf


40 lb Box Product #00377

LifeRock Donut

Donuts (7 inch)

Product # 00343

Liferock Flatz


Typical Size: 2 inches to upwards of 10 inches
5 lb box #00232; 20 lb box #00233
Learn More

Reefforest Kit

LifeRock™ Reef Forest Kit with Arches

Product #00363

Reefforest Extention Kit

LifeRock™ Reef Forest Extension Kit

Product #00364

Nano Rocks And Arches Kit

LifeRock™ Nano Reef Kit- 2 Nano Arches plus small Original

Product #00311

10lb Nano Box

LifeRock™ Nano Rock Original

Product 10 lb #00315

Single Hole Base Front View

Create-a-Scape LifeRock Single Hole Base Rock 1 pk

Product #00801

Triple Hole Base Rock

Create-a-Scape LifeRock Triple Hole Base Rock 1 pk

Product #00803

Table Rock

LifeRock™ Table Rock 

Typical Size: Approximately 18 x 12 x 5
Product #00316

10907,10914,10921 Reef Rods

Reef Rods

Create-a-Scape Purple Reef Rod 7″ Product #10907
Create-a-Scape Purple Reef Rod 14″ Product #10914
Create-a-Scape Purple Reef Rod 21″ Product #10921

Note: All sizes are approximate.

CaribSea African Cichlid Tank

With – South Seas Base Rock, South Seas Shelf Rock, LifeRock™, Eco-Complete™ Cichlid, RhyzoMat, Rubble Zone

Moani Picture 1

Moani™ Dry Live Rock

Meet Moani™ the safe, reliable and affordable alternative to wild-collected live rock. Moani™ is a high-porosity, real, aragonitic rock that is infused with living, spored bacteria to provide a fast start-up with compressed cycling time. Moani™ has subtle colors similar to natural live rock but without the pests. No curing is required.

Moani Picture 2 For 50 Lb Box

Assorted Shapes & Sizes

Product # 00393
UPC 008479003935
Available in 50 lb boxes

Moani Picture 3 Shroom


 Ideal for pinnacles and as frag platforms
Product # 00366 2/case
UPC 008479003669

Frag Rocks

Our frag rocks are designed to make fragging and reefing easier than ever. With just the right size for any coral, natural shapes, reef ready colors, and even holes for the ideal frag placement. When it comes to fragging, coral-scaping, and making the most of your reefing, CaribSea has you covered.



#00300 10 pk 
Learn More

LifeRock Fragzone


Get your frags seated faster on this preconditioned rubble!

Package Sizes:
2.25 pounds, #00379

Caribsea Rubble Zone

Rubble Zone™

Package Sizes:
1 Gallon Jar, (#00532)

South Seas Rocks

South Seas rock is the premium choice of natural base rock for marine, reef, and African cichlid aquariums. Incredible macro and micro porosity for the ultimate biological media, and beautiful shapes and gnarly texture perfect for invertebrate placement.

South Seas Base Rock 2

South Seas Base Rock

7 pound bag – Ideal for nano reefs or as accent rock in hardwater freshwater aquariums.

7 lb net bag (#10372); 10 lb net bag (#00372); 40 lb box (#00370); 500 lb pallet (#00373); 1000 lb pallet (#00374)
Shelf Rock 40 lb box (#00371)

Flatz rock

South Seas Flatz

Typical Size: 2 inches to upwards of 10 inches
Item: 5 lb box #00230; 20 lb box #00231


South Seas Shapes & Arches

Base rock doesn’t have to be basic.  South Seas Shapes and Arches bring open and multi-dimensional scaping to your reef, marine, or African cichlid tank.  These blend beautifully with our South Seas Base, Flatz, and Shelf rock so you can easily create incredible displays with the best base rock around.  Ditch the old rock pile and let South Seas Shapes and Arches take your scape to the next level!

South Seas Shapes

South Seas Shapes

00281.  Each box contains two of the 12” arches complete with frag holes,  one donut/tunnel, and one cave.

South Seas Arches

South Seas Arches

4 pk 00378. Each box contains four of the 12” arches complete with frag holes.

South Seas Premium Shelf Rock

South Seas Ultimate Shelf

20 lb box Product #00304