CaribSea Super Naturals Zen Garden Aquarium Substrate, 20-lb bag

Skip image gallery
Slide 1 of 2

$31.00 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card + Free Shipping with code: WELCOME
In Stock
FREE 1-3 day delivery on first-time orders over $35
Free 365-day returns

Pay in 4 interest-free payments of $7.75. .

About This Item

Details

  • Contains a variety of natural-color stones to help your finned friend feel right at home.
  • Pre-washed, pH neutral and promotes the growth of beneficial bacteria colonies.
  • Creating a natural environment for your fish helps reduce aggravation caused by reflections in the bottom of your tank.
  • Great for use in marine and brackish aquariums (sold separately) with proper buffering.
  • Each grain measures approximately 0.25–1.0 millimeters in size.

Frequently bought together

Questions & Answers

Be the first to ask a question.
Reviews
Write a Review
4.7
Rated 4.7 out of 5 stars
69 Ratings
Terms & Conditions

18 Customer Reviews

Rated 1 out of 5 stars
By Aurora on Jan 13, 2026

Ur a horrible seller

The packet that came with the rocks, which was supposed to help clear the water after use, killed all of my guppy fry even though I used it correctly.

The packet that came with the rocks, which was supposed to help clear the water after use, killed all of my guppy fry even though I used it correctly.

Rated 5 out of 5 stars
By Donald on Nov 18, 2025

Caribsea aquarium substrate

Caeribsea is one of the best commercial aquarium substrates on the market. One thing I noticed with this particular type was that you really have to rinse this for

Caeribsea is one of the best commercial aquarium substrates on the market. One thing I noticed with this particular type was that you really have to rinse this for a LONG time.

Rated 5 out of 5 stars
By Jeff on Jul 11, 2025

damaged

My package arrived heavily damaged with stones missing. The box looked like it had been retaped back up after most of the aquarium rocks were lost due to an open

My package arrived heavily damaged with stones missing. The box looked like it had been retaped back up after most of the aquarium rocks were lost due to an open bag. Chewy representative listened to me and is replacing 1 of my 20 pound aquarium rock bags. GREAT customer support!!

Rated 5 out of 5 stars
By Thomas on Dec 24, 2025

Great natural rocks

Very natural and blends with most decor

Very natural and blends with most decor

Rated 5 out of 5 stars
By Stephen on Nov 29, 2024

Very nice!

Super happy with the zen garden, my fish is all colored up and happy too!

Super happy with the zen garden, my fish is all colored up and happy too!

Rated 5 out of 5 stars
By Julie on Oct 15, 2024

Great gravel

Love the natural color compared to bright colors for my fish

Love the natural color compared to bright colors for my fish

Rated 3 out of 5 stars
By Jessica on Mar 29, 2024

Sharp Broken Pebbles

These are natural small pebbles for substrate and the colors are nice. The majority of my bag was broken and sharp. My fish have longer fins, and I have some bottom

These are natural small pebbles for substrate and the colors are nice. The majority of my bag was broken and sharp. My fish have longer fins, and I have some bottom feeders as well. The concern then becomes having sharp edges could lead to cuts and scrapes on their fins. I could hand pick a few pebbles that were rounded, but the majority was broken and too sharp. These are natural and that happens in nature. I didn't expect from the picture and other review photos to have so many broken sharp edges. It may have just been my bag. I've ordered a different substrate from the same brand and love it! I'll be ordering more of that one instead. Customer service was excellent and did what they could to make it right. Which I appreciate.

Rated 4 out of 5 stars
By Gina on May 6, 2024

The Aquatic Look

The creating of a new look is just a couple of fish away from being purchased. The aquarium look never as complete with the right kind of decor of sand, aquarium

The creating of a new look is just a couple of fish away from being purchased. The aquarium look never as complete with the right kind of decor of sand, aquarium rocks and gravel.

Rated 4 out of 5 stars
By TONI on Mar 22, 2024

Aquarium

I really like the natural stone look. I thought they were a little bigger than what I received.

I really like the natural stone look. I thought they were a little bigger than what I received.

Rated 5 out of 5 stars
By mary on Nov 17, 2023

Love this

Exactly what I wanted for 5 gallon freshwater tank, perfect color blend, not too brown. Five pound bag was enough for me. Just rinsed really well because some sand

Exactly what I wanted for 5 gallon freshwater tank, perfect color blend, not too brown. Five pound bag was enough for me. Just rinsed really well because some sand and teeny rocks.