







🪸 Elevate your reef game with nature’s secret substrate!
CaribSea Arag-Alive Special Grade Sand is a 20 lbs natural aragonite substrate designed specifically for reef and marine aquariums. It promotes coral growth through its porous structure, supports biological filtration to maintain water balance, and ensures pH stability for safe, healthy aquatic environments. Trusted by over 3,200 reef enthusiasts, it delivers clear water and a thriving ecosystem without complicated additives.







| Customer Reviews | 4.7 out of 5 stars 3,272 Reviews |
V**V
great sand
great sand!! thank you. no need to rinse with rodi water. cloudy water will go away fast if and only if floss is used. both of the nano tank water cleared in about one day. the cloudy water is really crushed sand. the sand is crushed during packaging and shipping. no need for reef carbon, purigen and phosguard when cycling new aquarium. some people use dry sand and dry rocks to start a new saltwater aquarium. please do test the aquarium water for nitrites, nitrates and ammonia for two months. the dry rock, dry sand method will take 60 days for the aquarium to cycle. then add filter media and cleanup crew ie. snails to the saltwater tank. make sure ammonia is zero before adding fish and cleanup crew. some hobbyists use real saltwater, live rocks and live sand. add add benificial bacteria with fritz turbo start 900 will help either way. both our tanks cycled fast with live rocks, live sand and real ocean water. livestock was added a few days later. and only after testing the aquarium water to ensure the aquariums was safe for fishes and a cleanup crew. both pairs of black snowflake extreme clownfish love it in their nano tanks. we used caribsea fiji pink sand and live rocks with plenty of coralline in the two nano tanks. coralline are the purple algae on the live rocks. coralline algae comes in many colors such as pink and purple. aquarium lights such as kessil are great for live rocks and coral, however, only ambient room lights are currently used to light both aquariums. the purple coralline on the live rocks will get lighter in color and the purple and pink colors in all likelyhood will fade without aquarium lights, however, the helpful and needed bacteria will still be alive. never leave the aquarium lights on for extended periods of time. do not keep the aquarium lights on for too long a period of time. in addition, overfeeding will cause the aquarium water to be nutrient rich for green hair algae, algae and cynobacteria better known as red slime algae. all saltwater aquariums have ugly stages. some hobbyists use a uv sterilizer to help with algae and ich. patience is needed for this hobby. water tests and at least three months are needed before adding easy corals. never introduce too many fishes to an aquarium. always do weekly or biweekly water changes. always use rodi water to topoff the evaporated water in the aquarium. never use tap water for aquarium water evaporation. always go slow. and read and post questions in saltwater aquarium forums.
A**R
Remember Pink Fiji
This is the best sand for reefers who enjoy reefing. (Pun intended)(o.O) This soft substrate is hardy for rocks and rockscapes but soft for my watchman gobie and pistol shrimp, my LPs corals all enjoy the soft substrate when on a rock. Conch snail and Nassarius snails can dig and burrow very well. I used this to kick start my tank nitr cycle on week 2 and my results have been stellar! Overall great tank look with quality feel when scaping. Always check water parameters! Make sure to QT fish(76day fallow) to avoid hitchhikers and free swimmers(ich) and check for parasites on Corals to not transfer to DT. Think Global. Shop Local. S4LT.TV
J**N
Beautiful sand Great quality!
Why did you pick this product vs others?: Beautiful sand for every tank set up easy to use doesn't cloud water for long.
V**S
Best sand you can get
This is the best live sand you can get. It looks good and works wonderfully for cycling. A new saltwater aquarium definitely get it. The difference between the other same brand of 20 lb sand is the Fiji Pink is a finer grade but that's good cuz it doesn't collect algae like the larger grain does. I know this is a couple dollars more than the other bag with the same amount, but it's definitely worth it, especially for a nano aquarium. I have a nano fusion 15 gallon and the Fiji pink works wonderfully. Also doing 3 or 4 in helps with keeping your aquarium clean and it cycles quicker, it gives the beneficial bacteria more space to do its thing. Just saying 😜
D**.
Great substrate
This substrate has stabalized my alkalinity and seems to also have done the same for my calcium and magnesium.
M**L
great sand. great price. not very pink.
CaribSea Arag-Alive is a great product. The sand is very fine: little larger than table salt. It is bio active so your cycling will be much faster. It also come with a clarifying pack that you add to the water to help clear it up. After adding the sand to the tank it was milk white. I added the classifier and when i got back from work the next dayt eh water was crystal clear. The only down side is it is not pink by any mean. It is typical beach sand color with small amounts of pink rock/sand/particulate in it. A great deal and product but it is slightly more pink sand colored then anything I would ever consider calling pink.
L**S
Great Product.
As described.
D**L
The best sand.
This was the best price. It ships from pet smart or pet co. And got Amazon price. Came fastish. Supper happy with the product. Makes my fish tank look so much better. When put it in the water became clear really fast too, didn’t stay foggy long.
Trustpilot
5 days ago
3 weeks ago