CARIBSEA Seaflor Special Aragonite Aquarium Sand, 40-lb bag -

CaribSea Seaflor Special Aragonite Aquarium Sand

By CaribSea
Rated 4.8333 out of 5 stars

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$26.99Chewy Price
$46.99Chewy Price

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Fish TypeTropical FreshwaterTropical FreshwaterTropical FreshwaterTropical FreshwaterTropical Freshwater
Aquarium TypeFreshwaterFreshwaterFreshwaterFreshwaterFreshwater

About This Item


  • Provides highly-dissoluble calcium carbonate and helps your tank maintain a stable pH balance.
  • Each grain measures approximately 10–20 millimeters in size.
  • High density sand settles quickly and is easy to keep clean.
  • Contains no ash, metals, pesticides or silica.
  • Specially designed for use with plenum-type, nitrate-reducing beds (sold separately).

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Questions & Answers

6 Customer Questions

Description says "Each grain measures approximately 10–20 millimeters in size." Is that a mistake? 1 to 2 cm is what that means. Not sand at all.

How big of a tank does the 40lb bag cover?
Answer by ChewyMar 30, 2022
As a general rule, 1 to 2 pounds per gallon is typical. If you wanted a deeper bed, 80 to 100 pounds would work. If not, 40 to 60 pounds would give you coverage without too much depth. As an example, for a 48 by 12 inch tank, 60 pounds would give you just about a 2 inch bed depth.

Can I use in a Tropical Freshwater tank?
Answer by ChewyJul 31, 2022
This sand can be used in a tropical freshwater tank.

Is this white, beige, tan or ivory substrate?
Answer by ChewyJul 18, 2022
Seaflor special grade Reef Sand is a light weight color. Under most aquarium lighting it shows off a very bright white. Lighting will affect what color it reflects though as it is generally white.

ReviewsWrite a Review

Rated 4.8333 out of 5 stars
6 Reviews
Would recommend to a friend

6 Customer Reviews

Rated 5 out of 5 stars
By Gyanendra on Jun 4, 2022

I highly recommend to all

This product is very fine and good size I was not confident about product before I buy but it arrived super quick I ordered it day before at evening time and it arrived next morning with in like 18 hours. And the product good I love it my reef tank love it.

Rated 5 out of 5 stars
By goldtmoney on May 27, 2022

"Carib Sea" reef starter

Super start for Reef Tanks. Great item for price@ Chewy ! This is a super way to jump start your Saltwater Tank. Using this Carib Sea Aragonite material builds great bio-DBS tank floor. With a jump start micro bacteria liquid this is a good way to get fish in your tank in a week or two.

Rated 5 out of 5 stars
By ReefinInFlorida on May 3, 2022

This is A LOT of sand!

Best bang for your buck without doubt. Great for saltwater/reef aquariums. The bag is huge and you will be glad you went with this grade of sand. Looks great, and does not blow around unless you have a high rate of flow going through your tank.

Rated 5 out of 5 stars
By Trumpy on Feb 16, 2022


I bought 200 pounds of rock for a new aquarium, they were $200 dollars less on here then anyone, and had it to my door in less then 24hrs!!!

Rated 4 out of 5 stars
By Steve on Jan 12, 2022

After Lots of Rinsing to get clean.

I purchased 120 lbs on sale at almost half price. It took a lot of rincing to get the water to run clear. The product was a good size and quality otherwise. Very happy at the price I purchased at.

Rated 5 out of 5 stars
By JayR on Nov 25, 2021

Reef staple

This is the best substrate for the reef aquarium in my opinion. Perfect size for sand sifters and helps maintain PH. Also easy to vacuum for detritus removal