CaribSea Super Naturals Crystal River Freshwater Sand, 20-lb bag

By CaribSea
Rated 4.88 out of 5 stars
$34.99Chewy Price

In Stock
FREE 1-3 day delivery over $35

Frequently Bought Together

CaribSea Super Naturals Zen Garden Aquarium Substrate, 5-lb bag
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$5.99Chewy Price
Marina LED Aquarium Kit, 20-gal
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Total Price: $189.12

About This Item


  • Beautiful, natural uncoated river substrate that offers natural sand, packed with living, water-purifying bacteria, clarifier and a complete water conditioner.
  • Sand-size grains are great for bottom dwellers, plus it’s easy to create a natural habitat—just use tap water to begin.
  • Approximately 0.5-1.0 mm grain-size, it immediately starts the cycling process by eliminating new tank syndrome and discouraging bothersome algae.
  • Perfect way to detoxify metals, eliminate ammonia, neutralize chlorine and chloramines, for a safe environment.
  • Provides a protective slime coat for stressed fish, plus it reduces nitrates and nitrites, which can have a negative effect on fish, plants and the aquarium environment in general.

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Fish TypeTropical FreshwaterTropical FreshwaterTropical FreshwaterTropical FreshwaterTropical Freshwater
Aquarium TypeFreshwaterFreshwaterFreshwaterFreshwaterFreshwater

Questions & Answers

13 Customer Questions

Can this be added to an established tank without harming the fish?
Answer by ChewyApr 09, 2019
It's not recommended to add this to an already established tank. This sand should be gently rinsed with clean, fresh water, then place into the aquarium before adding the water, rocks and décor. All filters and pumps should be started before introducing the fish back into the tank. It's best to read the directions on the bag before use.

Is this good for turtles?
Answer by ChewyJul 05, 2018
This sand is appropriate for most freshwater aquariums including turtles, angel fish, tetras, cichlids and more.

How many bags will be needed for 65 gallon aquarium?
Answer by ChewyJun 12, 2019
Determining how much substrate to buy for your new aquarium depends on the size and shape of your tank, as well as the depth of the substrate bed you wish to achieve. We suggest 1 pound of substrate per gallon, to achieve a 1 inch bed or use 2 pounds per gallon, for a 2 inch deep bed.

Is this sand white is it good to use with cold water fish tank
Answer by ChewySep 11, 2019
This item has a tan-like color and is intended for freshwater aquariums.

ReviewsWrite a Review

Rated 4.88 out of 5 stars
25 Ratings
Would recommend to a friend

25 Customer Reviews

Rated 2 out of 5 stars
By LizB on Aug 6, 2023

Water Fleas

Love the sand. Unfortunately, it brought Copepods along with it and now my tank is covered with them.

Rated 5 out of 5 stars
By Crazyhorse2098 on Jan 29, 2023

Excellent sand!

I bought 3 bags for my 55 gallon aquarium and did what the directions said. Loosely raised the sand in the bag with a hose and put it in the tank. Added water and my plants & accessories and it was clear from the start!! If they have black, I'm going to get more for my 2 other tanks with gravel in them now. VERY PLEASED!

Rated 5 out of 5 stars
By Marky on Jul 14, 2023


Beautiful sand didn't need to rinse

Rated 5 out of 5 stars
By Remcd on Oct 31, 2022

Aquarium sand instead of gravel.

I decided to put sand in my aquarium instead of gravel and I love the look. Live plants look great and the fish can be seen so much better. Piled high in back and don't smooth it out.

Rated 5 out of 5 stars
By Brelynn on Nov 10, 2022

Beautiful Sand

It was perfect for my aquarium. It's not nutrient rich so root tabs or the like will need to be added for live plants. The sand is very fine so care is needed when cleaning.

Rated 5 out of 5 stars
By Chree on Apr 12, 2022

Very pretty sand!

This sand looks beautiful in my tank. You can see all the little sand crystals. I also love that it came with the water clarifier so I didn’t have to buy that separately. The color really makes my live plants and fish look great, and my ghost shrimp love it too.

Rated 5 out of 5 stars
By Cozmo35 on Jul 7, 2022

Love this sand

So far I love this sand and my Cory's and trapdoor snails love it too!

Rated 5 out of 5 stars
By becka on Oct 9, 2021

Don’t wash it!

Do not rinse this sand! It contains good live bacteria and if you rinse it, you take all of what you paid for away! I put 20lb into my 10 gallon and love the look. It did not cloud my water even a little bit, I used a pitcher to slowly pour the water in one corner and let the water work it’s way around. Absolutely zero issue with clouding.

Rated 5 out of 5 stars
By glo2 on Aug 22, 2021

So easy to use

The instructions on the bag were amazing! It was so easy step-by-step instructions and suggestions that it was easy for me. And that was important because I am in a Mobile Wheelchair with very bad arthritis and the instructions help me to lessen my stress! I highly recommend this product and will use it again since I only got a 20 pound bag and I’ll need another one.

Rated 5 out of 5 stars
By sand1 on Sep 27, 2021

Best sand ever

This is bar far the greatest buy for a really good price. All four of my tanks have this sand in it.