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

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$19.99 Chewy Price
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About This Item

Details

  • 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.

Instructions

Size

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Questions & Answers

12 Customer Questions

Can this be added to an established tank without harming the fish?

Answer by Chewy • Apr 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.

How many bags will be needed for 65 gallon aquarium?

Answer by Chewy • Jun 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 good for turtles?

Answer by Chewy • Jul 05, 2018
This sand is appropriate for most freshwater aquariums including turtles, angel fish, tetras, cichlids and more.

Is this sand white is it good to use with cold water fish tank

Answer by Chewy • Sep 11, 2019
This item has a tan-like color and is intended for freshwater aquariums.
Reviews
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4.8
Rated 4.8 out of 5 stars
60 Ratings
Terms & Conditions

38 Customer Reviews

Rated 5 out of 5 stars
By Jackson on Dec 13, 2025

Great sand and low price

I was surprised to find how cheap this sand was, especially since it came with 20 pounds of sand. It is great for the catfish and plants, because it has a larger

I was surprised to find how cheap this sand was, especially since it came with 20 pounds of sand. It is great for the catfish and plants, because it has a larger grain size that allows waste to fall through easily, and allows catfish to dig through for food easily.

Rated 5 out of 5 stars
By Everest on Dec 14, 2025

Color and grain size was great.

Grain size is perfect for my cory catfish to sift in and the bright white color of the sand makes the plants and fish really pop.

Grain size is perfect for my cory catfish to sift in and the bright white color of the sand makes the plants and fish really pop.

Rated 5 out of 5 stars
By clasielady on Sep 1, 2025

learning. first time user for sand

i am just learning about this sand, has a foggy tank but for got to add the bioclean stuff it came with in it, so i think im going to use this sand when i

i am just learning about this sand, has a foggy tank but for got to add the bioclean stuff it came with in it, so i think im going to use this sand when i build my 29 gallon tank

Rated 5 out of 5 stars
By Pam on Aug 30, 2025

Corydoras love this!

This is great substrate for bottom feeders like Cories. My plants are also doing well. Would recommend!

This is great substrate for bottom feeders like Cories. My plants are also doing well. Would recommend!

Rated 5 out of 5 stars
By Kourtney on May 3, 2025
Top 1000 Contibutor

Excellent

Excellent texture and visual appeal. My Cichlids love it! Easy substrate to place live plants in. Soft enough to allow my algae eaters to swim on without hurting

Excellent texture and visual appeal. My Cichlids love it! Easy substrate to place live plants in. Soft enough to allow my algae eaters to swim on without hurting themselves. I did rinse this product out thoroughly (and soaked it for several days) before adding to my tank. Makes the water real cloudy despite the rinsing but clears up beautifully in a couple of days.

Rated 5 out of 5 stars
By Val on Sep 24, 2025

Shipping

Items were shipped and delivered in a timely manner

Items were shipped and delivered in a timely manner

Rated 5 out of 5 stars
By devyn on Mar 25, 2025

Natural sand

Clean natural sand delivered to my door. No dyes no extra chemicals just clean natural sand

Clean natural sand delivered to my door. No dyes no extra chemicals just clean natural sand

Rated 5 out of 5 stars
By Andrea on Feb 7, 2025

Easy too use

My plants look good with this in the bottom of my aquarium

My plants look good with this in the bottom of my aquarium

Rated 4 out of 5 stars
By Deborah on Mar 7, 2025

Beautiful once water cleared

Fish seem happier and energetic

Fish seem happier and energetic

Rated 5 out of 5 stars
By Deanna on Jun 25, 2024

Very Pleased

We followed the instructions listed on the bag and so far, we are very pleased with the results. Within 20 minutes, as stated, my tank started to clear. Last time,

We followed the instructions listed on the bag and so far, we are very pleased with the results. Within 20 minutes, as stated, my tank started to clear. Last time, we used just play sand in our aquarium and it took days to clear. We just added the sand today so time will tell how well the fish like it but so far, I’m extremely pleased.