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CaribSea Eco-Complete 20-Pound Planted Aquarium, Black

4.7 4.7 out of 5 stars 4,848 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Aquarium Gravel by Carib Sea

$29.99
20 POUNDS
Black
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Brand Carib Sea
Item Weight 20 Pounds
Item Form Granules
Target Species Fish
Allergen Information Buckwheat

About this item

  • Complete substrate for freshwater planted aquariums
  • Contains major and minor trace elements to nourish aquarium plants
  • Substrate encourages healthy plant root growth
See more product details

Customer ratings by feature

Style
4.7 4.7
Sheerness
4.5 4.5
Value for money
4.4 4.4
Easy to clean
4.4 4.4

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About Us

CaribSea Inc. is in the hands of a second generation of aquarists, scientifically trained and with decades of experience. Since 1975 CaribSea has remained on the leading edge of closed system development by matching substrate mineralogy and hardscapes to the universe of microbiology. CaribSea is constantly changing and evolving but what remains the same is the commitment to producing one of the most advanced and very best quality products in our field.

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CaribSea Eco-Complete 20-Pound Planted Aquarium, Black

CaribSea Eco-Complete 20-Pound Planted Aquarium, Black


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Product Description

New formula for enhanced root development. Why does Eco-Complete planted aquarium substrate outperform other products? For the same reason that Hawaii, Bali and Costa Rica are famous for lush, exuberant plant growth. The secret lies in rich basaltic volcanic soil which contains iron, calcium, magnesium, potassium, sulfur plus over 25 other elements to nourish your aquatic plants. Eco-Complete Planted Aquarium Substrate is mineralogically and biologically complete, giving you luxuriant aquatic plant growth without nuisance algae. Iron rich Eco-Complete eliminates the need for laterite. No artificial dyes, paints, or chemical coatings. Eco-Complete has highly porous spherical grains for optimum diffusion performance and contains live Heterotrophic bacteria to rapidly convert fish waste into natural food for your aquatic plants. It establishes a natural biological balance which makes cycling a new aquarium faster and safer. Directions: Add Eco-Complete to empty aquarium, then add water, plants, start all filters and pumps. If adding to an existing tank, mix in a few pounds a day over a period of a week or more.

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This Item
CaribSea Eco-Complete 20-Pound Planted Aquarium, Black
CaribSea Eco-Complete 20-Pound Planted Aquarium, Black
Recommendations
Fluval 12693 Plant and Shrimp Stratum for Freshwater Fish Tanks, 4.4 lbs. – Aquarium Substrate for Strong Plant Growth, Supports Neutral to Slightly Acidic pH
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Price$29.99-6% $18.72
Typical:$19.99
-34% $24.27
List:$36.97
-8% $34.99
Typical:$37.99
$19.95
Delivery
Get it May 16 - 17
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Customer Ratings
Style
4.7
4.1
4.6
4.8
4.3
Value for money
4.4
4.0
3.8
4.4
3.4
Sheerness
4.5
3.7
3.2
3.7
Easy to clean
4.4
3.0
4.4
3.1
Sold By
Petco
Amazon.com
Amazon.com
Central Pet Smart
Amazon.com
target species
Fish
Fish, Shrimp, Plant
Fish
Fish
form
Granules
Granules
Flakes
weight
20 pounds
4.4 pounds
3.1 pounds
20 pounds
1 pounds

Customer reviews

4.7 out of 5 stars
4.7 out of 5
4,848 global ratings

Customers say

Customers are happy with the quality, ease of cleaning, appearance and substrate of the aquarium pond water treatment. They mention that it works well, does not dirty the water and that it adds a nice dark natural look to the tank. They also appreciate the top notch substrate for aquariums. Customers also are happy that it's easy to plant and grow. However, some customers differ on color and water quality.

AI-generated from the text of customer reviews

564 customers mention493 positive71 negative

Customers like the quality of the substrate. They mention it's great, works well, and has beneficial properties. Some say it'll work well for their planted tank and that it'd be some of the best dirt they could get.

"...that were just hanging on so I decided to buy this because it never goes bad and keeps actual live bacteria colonies in the substrate...." Read more

"This stuff is great, easy to plant in, and most important does nothing to your water parameters, well..." Read more

"...Easy to clean and to plant in! So much cheaper than the alternatives!!" Read more

"...Looks really good, very happy after that work. No fish died." Read more

312 customers mention302 positive10 negative

Customers are satisfied with the appearance of the substrate. For example, they mention it looks nice, is extremely attractive, and contrasts nicely with the shrimp and fish. Some say that the substrate is easy to clean and to plant in, and stays a nice rich black.

"...brought my plants back and some they now have new sprouts and are so beautiful and the fact that this stuff lasts forever due to the nutrients its..." Read more

"Looks great but did raise the ph to 8. I had to place a few plants in small peat moss disks to lower the ph back to 7" Read more

"...My plants grow beautifully and it stays a nice rich black. Easy to clean and to plant in! So much cheaper than the alternatives!!" Read more

"...No rinse required and it looks great. You will need to change your filter but that’s it. Very pleased." Read more

239 customers mention208 positive31 negative

Customers like the growth of their plants in their aquarium or pond using the Eco Complete planted substrate. They say the plants flourish, grow better than regular gravel, and are happy. Some say the substrate is the best they've used and their plants are happy and healthy.

"My favorite substrate for the $!! My plants grow beautifully and it stays a nice rich black. Easy to clean and to plant in!..." Read more

"...love how the black contrast with the green and does a great job at growing plants" Read more

"...recommend this substrate to anyone who wants no fuss, and plant friendly beautiful gravel in their aquariums you won’t be disappointed!..." Read more

"...ones and moving or removing the other decorations.. The plants grew so healthy and my Corydoras went crazy grazing along the bottom...." Read more

168 customers mention146 positive22 negative

Customers like the ease of cleaning with the aquarium pond water treatment. They say it does fine, does not dirty the water, and does not need raising by water. Customers also mention that it clears up within a few hours and that it is far less messy than stratum.

"...This stuff is SO easy to use, especially as there is NO pre rinsing required! I HIOGHLY recommend it!" Read more

"...My plants grow beautifully and it stays a nice rich black. Easy to clean and to plant in! So much cheaper than the alternatives!!" Read more

"...No rinse required and it looks great. You will need to change your filter but that’s it. Very pleased." Read more

"Doesn't even need to be rinsed and clears up instantly. Only buy this never fluval" Read more

156 customers mention156 positive0 negative

Customers are satisfied with the substrate. They mention that it's a great substrate for planted tanks, and is one of the most highly regarded substrate choices for planted tank. Some say that the substrate is better than Fluval stratum substrate and is excellent for shrimp and plants.

"...But it does have some downsides.TL;DR: Good dirt, fish and plants love it. Expensive...." Read more

"...The rest of the tank has river rock. This substrate is really good." Read more

"...The fish seem fine with it. The snails took right to it no problem, and the shrimp love it for all the nooks and crannies to reach into...." Read more

"I bought 4 bags of this for my 55 gal aquarium. It made a nice thick layer on the bottom perfect for planting...." Read more

145 customers mention119 positive26 negative

Customers find the aquarium pond water treatment very easy to plant the roots of the plant to the depth they want. They say the plants are taking root and growing in it and they love it. They also say it's less time consuming, and provides good root development.

"...This stuff is SO easy to use, especially as there is NO pre rinsing required! I HIOGHLY recommend it!" Read more

"This stuff is great, easy to plant in, and most important does nothing to your water parameters, well..." Read more

"...in water/conditioner already so no need to wash which makes it very easy to use, just dump it in the tank as is..." Read more

"...I recommend this substrate to anyone who wants no fuss, and plant friendly beautiful gravel in their aquariums you won’t be disappointed!..." Read more

151 customers mention75 positive76 negative

Customers are mixed about the water quality of the aquarium pond water treatment. Some mention that it didn't make their water cloudy on first adding water, while others say that it does cause cloudiness if added to an existing aquarium.

"...stuff is great, easy to plant in, and most important does nothing to your water parameters, well it has no effect on my water after 2 weeks...." Read more

"...which isn't a "con" but it is something I had to mention - it clouds the tank at first. You are adding dirt to a tank.. it is going to happen...." Read more

"...All done---no cloudiness, no smell, no unexpected worms. Really nice. I just have to wait to cycle the aquarium...." Read more

"...Everything clouded up, there were die-offs, and clearly fungus and bacteria started growing everywhere in the water column, and when I left for the..." Read more

83 customers mention55 positive28 negative

Customers are mixed about the color of the aquarium pond water treatment. Some mention that it is very dark, while others say that it's more of a dark brown color.

"...It truly is black but there are some darker shades of brown which I think adds a little extra color to the tank...." Read more

"...continue to be amazed with the new growth of my plants and bright coloring of my shrimp! By far the easiest substrate I’ve worked with. NO rinsing!..." Read more

"...About eight weeks have gone by now and my bottom is now about half white, half black. In short I vacuum up a lot of Eco...." Read more

"...This substrate, black in color and most attractive, isn't so light that plants won't set in the soil without some type of weight...." Read more

How easy it is to work with
5 Stars
How easy it is to work with
This stuff is great, easy to plant in, and most important does nothing to your water parameters, well it has no effect on my water after 2 weeks. All reading are perfect, and ph is always around 7.2. Will be buying more for my 120 gallon planted tank project. Awesome stuff!!!!!
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Top reviews from the United States

Reviewed in the United States on March 18, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
My favorite substrate for the $!! My plants grow beautifully and it stays a nice rich black. Easy to clean and to plant in! So much cheaper than the alternatives!!
Reviewed in the United States on April 3, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
Wow. What a great product. I had some plants that were just hanging on so I decided to buy this because it never goes bad and keeps actual live bacteria colonies in the substrate. This stuff brought my plants back and some they now have new sprouts and are so beautiful and the fact that this stuff lasts forever due to the nutrients its gathers and disperses ill never need another substrate. I mixed this with my colored gravel and its looks amazing. The black with the colored gravel makes my tank look like a huge Cosmic Brownie hahahaa but seriously don't buy no other bullcrap this stuff is amazing. Oh and pour the water in the bag in the tank too cause it has the bacteria in it.
Reviewed in the United States on May 7, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
The media could not be loaded.
 This stuff is great, easy to plant in, and most important does nothing to your water parameters, well it has no effect on my water after 2 weeks. All reading are perfect, and ph is always around 7.2. Will be buying more for my 120 gallon planted tank project. Awesome stuff!!!!!
Customer image
5.0 out of 5 stars How easy it is to work with
Reviewed in the United States on May 7, 2024
This stuff is great, easy to plant in, and most important does nothing to your water parameters, well it has no effect on my water after 2 weeks. All reading are perfect, and ph is always around 7.2. Will be buying more for my 120 gallon planted tank project. Awesome stuff!!!!!
Images in this review
Customer image
Customer image
Reviewed in the United States on October 27, 2012
Size: 20 POUNDSColor: BlackVerified Purchase
I am new to planted tanks. This is my very first attempt. I had a goldfish (Gunsmoke) as a dorm pet in college and then some guppies. I recently got a betta (Rupert Pad Kee Mao) for my desk at work, but he will need a home in my home when I need to be out of the office for extended periods. So I started research to make him a vaca home that rules. I spotted  CaribSea Eco-Complete 20-Pound Planted Aquarium, Black , just because I wanted black/natural substrate and started to read reviews. Honestly, they almost scared me away from this, but so happy I went with my gut. This stuff is amazing. Mind you I have a 5 gallon and it was daunting getting 20 lbs. of substrate. I worried that only using part would be a total mess. But guess what, it is fantastic. You are going to make a mess with any substrate, just head to your tub and work there.

Placing into the tank it was NASTY! So nasty that I thought about all the reviews to rinse it, second guessing and extremely worried about double work. No worries though, seriously DO NOT RINSE this substrate and read the directions especially when adding to an established tank. My little tank was almost clear an hour after running the filter. By the next day the tank was crystal clear. Planting day (Red Cabomba, Water Sprite, Banana Plant, Bacopa and Java Moss) it was so clean (with a few floaties). Planting did kick up a bit, but not as much as I would have thought.

It is now day four and the plants, even after all the stress I put them through, are thriving. I have not run chemistry on this tank yet, but will in a few days once it balances itself out (I don't want to freak myself into a tizzy looking at readings). I will probably get another tank (do not tell my husband) to use what is left. It looks fantastic, very natural with bits of rose and tan. I'll try to get back and update when Rupert moves into his penthouse in the next month.

Update:
It has been over a year and I still love this substrate. I did have a large die-off of plants due to being lazy and not caring for my plants as I should. But both Rupert (he never did return to my office) and an Anubias that was added after the original review was posted are thriving. The other plants (micro-sword, Bacopa and Wisteria) after the initial die-off are also doing really well Yeah, I have had a Petco Betta for over a year and he looks great swimming over 
CaribSea Eco-Complete 20-Pound Planted Aquarium, Black .
33 people found this helpful
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Reviewed in the United States on February 5, 2020
Size: 20 POUNDSColor: BlackVerified Purchase
For dirt, this is some of the best stuff you can get. But it does have some downsides.

TL;DR: Good dirt, fish and plants love it. Expensive. Have some Prime and Zeolite for ammonia leaks.

Pros: Contains great nutrients for plant growth
looks great
isn't sharp (doesn't hurt my corydoras)
comes packaged in water/conditioner already so no need to wash which makes it very easy to use, just dump it in the tank as is

Cons: the water it was packaged in was FREEZING COLD, so I could not add the water to the tank. I have no idea if the water had nutrients or if I was supposed to leave the water out, but I didn't like the idea of putting random different water in my tank anyway. I just scooped it out with my hands instead.
It is known to leach small amounts of ammonia into the tank for a while afterwards. I did have an ammonia spike of about 0.2ppm but I am not sure if it was from the eco complete or from the new plants (new plants tend to die off a bit, so they can also cause ammonia spikes). I added some zeolite to my filter and the ammonia went away very quickly. I recommend having some on hand just in case, as well as Seachem's Prime conditioner.
It is decently expensive.

And my last point, which isn't a "con" but it is something I had to mention - it clouds the tank at first. You are adding dirt to a tank.. it is going to happen. As you can see in the pictures, you can barely see in the tank at all. I couldn't even see my fish at one point. They were fine, they were in the tank as I swapped substrate and they were very curious and happy fish. After a few hours of running the filter it was crystal clear again.
Customer image
4.0 out of 5 stars Very Impressed
Reviewed in the United States on February 5, 2020
For dirt, this is some of the best stuff you can get. But it does have some downsides.

TL;DR: Good dirt, fish and plants love it. Expensive. Have some Prime and Zeolite for ammonia leaks.

Pros: Contains great nutrients for plant growth
looks great
isn't sharp (doesn't hurt my corydoras)
comes packaged in water/conditioner already so no need to wash which makes it very easy to use, just dump it in the tank as is

Cons: the water it was packaged in was FREEZING COLD, so I could not add the water to the tank. I have no idea if the water had nutrients or if I was supposed to leave the water out, but I didn't like the idea of putting random different water in my tank anyway. I just scooped it out with my hands instead.
It is known to leach small amounts of ammonia into the tank for a while afterwards. I did have an ammonia spike of about 0.2ppm but I am not sure if it was from the eco complete or from the new plants (new plants tend to die off a bit, so they can also cause ammonia spikes). I added some zeolite to my filter and the ammonia went away very quickly. I recommend having some on hand just in case, as well as Seachem's Prime conditioner.
It is decently expensive.

And my last point, which isn't a "con" but it is something I had to mention - it clouds the tank at first. You are adding dirt to a tank.. it is going to happen. As you can see in the pictures, you can barely see in the tank at all. I couldn't even see my fish at one point. They were fine, they were in the tank as I swapped substrate and they were very curious and happy fish. After a few hours of running the filter it was crystal clear again.
Images in this review
Customer image Customer image Customer image
Customer imageCustomer imageCustomer image
17 people found this helpful
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Reviewed in the United States on February 28, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
I absolutely love how the black contrast with the green and does a great job at growing plants
Customer image
5.0 out of 5 stars Great for growing plants
Reviewed in the United States on February 28, 2024
I absolutely love how the black contrast with the green and does a great job at growing plants
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Customer image
3 people found this helpful
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Reviewed in the United States on May 8, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
I have a 15-gallon Fluval Flex tank which will house a rare giant Betta (also have 2 smaller 10-gallon flex tanks each with a single male betta). The tank is going to be planted (like the other 2) so a quality substrate is important. I also divided the base of the tank into 2 areas: a small area of white aquarium sand separated from the CaribSea by a "wall" of pieces of slate.
I was able to sculpt the substrate with ease, and in order to not disturb the sand area too much I put a small plate on the CaribSea area and slowly added the conditioned water. Perfect. I was a little worried to find liquid in the bag the CaribSea came in and wondered about it clouding the water: it didn't.
This stuff is SO easy to use, especially as there is NO pre rinsing required! I HIOGHLY recommend it!
Reviewed in the United States on February 25, 2024
Size: 20 POUNDSColor: BlackVerified Purchase
This photo is just 30 minutes after I completed changing the tank out. I replaced the old decor and gravel and just poured the new substrate in. No rinse required and it looks great. You will need to change your filter but that’s it. Very pleased.
Customer image
5.0 out of 5 stars Really works
Reviewed in the United States on February 25, 2024
This photo is just 30 minutes after I completed changing the tank out. I replaced the old decor and gravel and just poured the new substrate in. No rinse required and it looks great. You will need to change your filter but that’s it. Very pleased.
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3 people found this helpful
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Top reviews from other countries

FRANK G.
5.0 out of 5 stars High quality for plants
Reviewed in Canada on March 28, 2023
Size: 20 POUNDSColor: BlackVerified Purchase
The best I've found for plants. I've tried numerous substrates ,I never vacuum, detritus,and uneaten food works its way down for biological fertilizer for roots. I've only ever used the black type. Keep and utilize the extra biological liquid in the bag. No rinse required. Draw back it's very expensive but it's an exceptional product.
Ol
5.0 out of 5 stars Got product
Reviewed in the United Kingdom on June 16, 2019
Size: 20 POUNDSColor: BlackVerified Purchase
Good product the plants in my aquarium are growing well in it
Larry G
5.0 out of 5 stars Good price
Reviewed in Canada on March 29, 2023
Size: 20 POUNDSColor: BlackVerified Purchase
Works well in a aquarium
david davies
5.0 out of 5 stars Very good
Reviewed in the United Kingdom on December 2, 2018
Size: 20 POUNDSColor: BlackVerified Purchase
Very good
One person found this helpful
Report
oniel Brown
4.0 out of 5 stars package was delivered no games
Reviewed in Canada on November 24, 2023
Size: 20 POUNDSColor: BlackVerified Purchase
the product is fine, more importantly it was delivered