Editor's Choice - Our Favorite Cobalt Aquatics Aquarium Décor Rocks

1. Cobalt Aquatics Tropical Flakes

User Ratings: 79 7

Cobalt Aquatics 21012 First Impressions

"Overall, they're great."

Overall, a great natural-looking stone in an aquarium. For the price, this should be solid resin. I hate negative reviews for awesome items just because the buyer didn't read! Really nice value for the money, I think. If you see black substrate, that was still waiting for the 2nd bag. I've bought quite a few packs to get the volume I needed. It's not difficult but you need rinse over and over to get the water clear.

  • Cobalt Aquatics Tropical Flakes
  • Prebiotics increase nutrient uptake and reduce waste for healthier fish and a cleaner tank
  • Improves coloration even more than the original formulation
  • Excellent for pre-spawning conditioning
  • Package Dimension: 4.0"L x 4.0"W x 6.3"H
  • Age range description: All Life Stages
  • Manufacture: Cobalt International Inc.
  • Product Dimensions: 4 x 4 x 6.3 inches; 8.64 Ounces
  • Editor's Impressions Of The Cobalt Aquatics 21012
  • Quality [star rating='4.2']
  • Value For Money [star rating='4.7']
  • Affordability [star rating='3.5']

Cobalt Aquatics 21012 Final Thoughts

"These were."

Originally I set up a waterfall with them, but decided to fill the tank all the way. But then again, it's 17lbs of rock so I struggled rating this one. The water deactivates it and makes it safe. I am only giving 4 star because I had no way to request a larger stone after order. Very surprised with how many rocks came with this order. Worth every penny, my nano looks great. Def need to clean before putting in your tank.

Overall Score
4.5

[star rating="4.5"]
(81 Points)

2. Universal Rocks 52-A Aquarium Decoration Rock

User Ratings: 54 5

Universal Rocks AQUARIUM DECOROCK-052-A First Impressions

"Its a fortune."

They are making these by sloshing resin around in a mold, so it's really thin. They get tossed around in shipping and chunks break off. I had to break up some of the larger ones to fit what I was looking for. Dragon stone has a nice reddish tone to it so it really stands out. My buddy said he found a better deal on etsy. I was very pleasantly surprised with these dragon stones. I've bought quite a few packs to get the volume I needed.

  • Universal Rocks 52-A Aquarium Decoration Rock
  • Country Of Origin : United States
  • The Package Height Of The Product Is 5 Inches
  • The Package Length Of The Product Is 9 Inches
  • The Package Width Of The Product Is 4.5 Inches
  • Manufacture: Universal Rocks LLC
  • Product Dimensions: 9 x 4.5 x 5 inches; 10.56 Ounces
  • Editor's Impressions Of The Universal Rocks AQUARIUM DECOROCK-052-A
  • Quality [star rating='3.5']
  • Value For Money [star rating='3.4']
  • Affordability [star rating='3.4']

Universal Rocks AQUARIUM DECOROCK-052-A Final Thoughts

"Perfect for her fishtank."

My cichlid love hiding under the caves. And I had some left over rock, mostly because I use a lot of driftwood and plants. The holed rock formation is a nice design, but the material being is way too thin. The structure is roughly 14l x 6h x 4d. Other fish may not like the ph change. Honestly it's a good idea to have some glue on hand anyways. The only thing that was frustrating was the wait time for the shipping.

Overall Score
4.0

[star rating="4"]
(32 Points)

3. Carib Sea ACS00372 3 case South Sea Base Rock Bag for Aquarium, 10-Pound

User Ratings: 77 5

Carib Sea 008479003720 First Impressions

"Did buy again."

Com is the only place I trust for my tanks. It was plenty for the tank I wanted to scape. I had to break up some of the larger ones to fit what I was looking for. It looks nice, and my kids had fun choosing which parts to hot glue onto the rock. And placed in a 36 gallon bowfront. Not sure why but I just expected more. We are working on the hardscape for our new 36G bow front.

  • Carib Sea ACS00372 3 case South Sea Base Rock Bag for Aquarium, 10-Pound
  • No curing needed, South Seas is ready to use right away
  • It makes the best live rock to, takes coralline algae beautifully
  • Package Dimensions: 18.415 L x 33.528H x26.797W(centimeters)
  • Package Weight : 4.813 kilograms
  • Manufacture: TopDawg Pet Supply
  • Product Dimensions: 1 x 1 x 1 inches; 1 Pounds
  • Editor's Impressions Of The Carib Sea 008479003720
  • Quality [star rating='3.8']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

Carib Sea 008479003720 Final Thoughts

"Small but cute display."

I couldn't find these at any of the aquarium stores near me, chain or independent. I'm always hesitant to buy it online, but this was a good transaction. It was well worth time and effort to get them clean. Different shapes and sizes to work with. The shapes very interesting and pleasant to look at. I'm always hesitant to buy it online, but this was a good transaction. The bag I received was 17lbs and the rocks were in good condition.

Overall Score
4.6

[star rating="4.6"]
(296 Points)

4. WAVE Volcanic Rock for Aquariophilie Black

User Ratings: 45 20

WAVE A8011064 First Impressions

"Beautiful smooth rocks."

You definitely get a lot of slate for the price. But it was definitely not what I expected. These are just what I needed to creat stone walks in my model railroad park. I had to break up some of the larger ones to fit what I was looking for. Dragon stone has a nice reddish tone to it so it really stands out. One bigger chunk and five medium chunks. Also, if you need any manzanita or any other driftwood.

  • WAVE Volcanic Rock for Aquariophilie Black
  • Decorative for freshwater aquarium
  • Vulcanic rock
  • Natural
  • No toxic
  • Black
  • Manufacture: CROCI
  • Editor's Impressions Of The WAVE A8011064
  • Quality [star rating='3.5']
  • Value For Money [star rating='3.1']
  • Affordability [star rating='3.6']

WAVE A8011064 Final Thoughts

"These are kinda gorgeous!"

I placed an order of 10ilbs for my 20g high. After playing with them for awhile now. Originally I set up a waterfall with them, but decided to fill the tank all the way. My order came with large and small pieces allowing for some good combinations. I placed an order of 10ilbs for my 20g high. Truly something unique that will appeal to any aquarist. They match perfectly to my center piece and the cichlids love hiding in them.

Overall Score
3.6

[star rating="3.6"]
(39 Points)

5. POPETPOP 1PC Floating Rock Suspended Artificial Stone Aquarium Decor Fish Tank Decoration Floating P...

User Ratings: 64 18

POPETPOP First Impressions

"Did buy again."

For the price, this should be solid resin. You should never buy rocks but there's no Dragon stone down by the river. My only problem is trying to arrange them. I use it in my resin art work and it looks fantastic! So I bought these thinking I'd get much bigger pieces. And will change the hardness and ph of your water as it leeches. I got this for my 10 gal and it fits beautifully!

  • POPETPOP 1PC Floating Rock Suspended Artificial Stone Aquarium Decor Fish Tank Decoration Floating Pumice Flying Rock Ornament - Size S
  • ★Just place the sticker to the base of the glass aquarium full of water.
  • ★The stone will float easily at any level by adjusting the length of string.
  • ★Make your fish tank like a magic land in the movies.
  • ★Perfect decorations for your aquarium!
  • ★Eco-friendly Material:Made of advanced resin, this Aquarium Decoration Rock will do no harm to your fish pet. It's non-polluting and non-radioactive.
  • Manufacture: POPETPOP
  • Product Dimensions: 3.62 x 2.28 x 2.28 inches; 1.48 Ounces
  • Editor's Impressions Of The POPETPOP
  • Quality [star rating='4']
  • Value For Money [star rating='5']
  • Affordability [star rating='3.4']

POPETPOP Final Thoughts

"Very realistic looking."

Loved what I got, highly reccomend these. The water deactivates it and makes it safe. This isn't even all of them in the photo. You should never buy rocks but there's no Dragon stone down by the river. I purchased these for decor for my aquarium and I adore how they turned out. The bag I received was 17lbs and the rocks were in good condition. Got this for my betta fish, he LOVES it.

Overall Score
4.1

[star rating="4.1"]
(7 Points)

6. 006082 Exotic Environments Geode Stone Purple, 4.5"

User Ratings: 41 18

Blue Ribbon EE-1131 First Impressions

"No complaints!"

I will not be able to get all 7 rocks in my Bio Orb 8 gallon tank. Cleaned the dust and clay residue off under running water and some brushing. They fit perfectly in my ten gallon aquarium. The edges of holes are also sharp, but easy enough to smooth with a razor knife. Don't even hesitate purchasing these stones. I soaked the rocks for about 20-25 min, took them out and hosed them off really well. I am looking forward to getting my tank stocked up!

  • 006082 Exotic Environments Geode Stone Purple, 4.5"
  • Safe for fresh or salt water aquariums and terrariums
  • Handcrafted
  • Durable quality and non-toxic
  • Authentically detailed; life-like
  • Measures approximately 4.75"L x 3.75"H x 3"W
  • Manufacture: Blue Ribbon Pet
  • Product Dimensions: 1 x 1 x 1 inches; 8.89 Ounces
  • Editor's Impressions Of The Blue Ribbon EE-1131
  • Quality [star rating='4']
  • Value For Money [star rating='2.6']
  • Affordability [star rating='3.4']

Blue Ribbon EE-1131 Final Thoughts

"Looks so good."

Not bad at all for twenty bucks total. These are just what I needed to creat stone walks in my model railroad park. My only problem is trying to arrange them. No I dont work for them and no I dont get anything for saying that. Don't even hesitate purchasing these stones. Was a LOT to clear off the gray dust if using in an aquarium. Other fish may not like the ph change.

Overall Score
3.6

[star rating="3.6"]
(26 Points)

7. Balacoo Stone Rock Aquarium Rocks for Aquascaping Mountain Stone Decoration Ornament

Balacoo 0ORXX11B08K0ZL9Q05FIO First Impressions

"This stone is gorgeous."

These are excellent stones and a great buy for the money! I'm pretty happy with the rock I received. Great product and it will definitely be buying more. There aren't any large enough to fully cover an entire base however. Shipping was very fast and even came early. Honestly it's a good idea to have some glue on hand anyways. I wanted a large stone to stand out from the rest.

  • Balacoo Stone Rock Aquarium Rocks for Aquascaping Mountain Stone Decoration Ornament
  • Made of high quality material, durable and lasting for use.
  • Enhance more beautiful look for your aquarium or fish tank.
  • They provide a beautiful decoration for your aquarium, also is an excellent hiding place for fish ,Looks more natrually.
  • It offers a natural environment, changing your aquarium to a beautiful landscape
  • Its great to decorate your aquarium all the time with minimal responsibility and maintenance
  • Manufacture: Balacoo
  • Product Dimensions: 4.13 x 3.39 x 1.97 inches; 1.28 Pounds
  • Editor's Impressions Of The Balacoo 0ORXX11B08K0ZL9Q05FIO
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

Balacoo 0ORXX11B08K0ZL9Q05FIO Final Thoughts

"This was exactly perfect."

The big rocks and theses small ones go perfect together. Honestly it's a good idea to have some glue on hand anyways. Other fish may not like the ph change. Also, if you need any manzanita or any other driftwood. My order came with large and small pieces allowing for some good combinations. I got these for a betta sorority tank. We are working on the hardscape for our new 36G bow front.

Overall Score
5.0

[star rating="5"]
(1 Points)

8. Rocks To Go Golden Sheen Quartz Slate 2-4lb (5-6" Size) 5-6pc with Bonus for Fairy Gardens, Aquarium...

Rocks To Go First Impressions

"Beautiful rocks."

I used these for Aquarium decor and they look lovely in a planted tank. Perfect to go around my water feature in my garden. You definitely get a lot of slate for the price. They are worth very dollar, and a very good price. The structure is roughly 14l x 6h x 4d. When I opened the box I was so surprised and shocked. And will change the hardness and ph of your water as it leeches.

  • Rocks To Go Golden Sheen Quartz Slate 2-4lb (5-6" Size) 5-6pc with Bonus for Fairy Gardens, Aquariums, Reptiles, Warhammer, D&D
  • Manufacture: Rocks To Go
  • Item Weight: 4 Pounds
  • Editor's Impressions Of The Rocks To Go
  • Quality [star rating='4.6']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='4.8']

Rocks To Go Final Thoughts

"Small but cute display."

We ended up with two custom plants in the end, and a nicer custom rock. Honestly not much more I can say about rocks. I placed an order of 10ilbs for my 20g high. The price for the quantity of rock kind of drives me nuts. I got a nice large piece that was about six or eight inches wide. The result is a beautiful black rock with white lines. I got several smaller pieces that were about four to five inches wide.

Overall Score
5.0

[star rating="5"]
(1 Points)

9. Shuohu Stimulation Floating Moss Rock Resin Stone | Fish Tank Decorated Rock Aquarium Landscape Deco...

User Ratings: 48 14

Shuohu First Impressions

"This is just beautiful!"

Honestly it's a good idea to have some glue on hand anyways. Photo 3 is during a diluted muriatic acid bath. I thought the price was great for the quantity and quality as well. The best part about this product was that it came with additional plants. They match perfectly to my center piece and the cichlids love hiding in them. The best part about this product was that it came with additional plants. Originally I set up a waterfall with them, but decided to fill the tank all the way.

  • Shuohu Stimulation Floating Moss Rock Resin Stone | Fish Tank Decorated Rock Aquarium Landscape Decoration S
  • Lightweight, it can float on the water.
  • The stone surface has many holes, can contact large area, can absorb harmful bacteria and heavy metals in the water, also can help plant climb and eradicate, the plant itself soluble minerals not only lead to the growth of fish, but also can provide fertilizer for the plant.
  • High quality material, with fine workmanship, realistic and not easy to fade.
  • The sucker can be attached to the rope of the stone and dragged into the water to make the sucker grip the bottom of the tank and create a floating landscape.
  • Size S: 5.8cm x 9.2cm/2.28" x 3.62" (Approx.) Size M: 8.7cm x 14cm/3.43" x 5.51" (Approx.) Size L: 13cm x 19cm/5.12" x 7.48" (Approx.)
  • Manufacture: Shuohu
  • Editor's Impressions Of The Shuohu
  • Quality [star rating='3.2']
  • Value For Money [star rating='2.3']
  • Affordability [star rating='2.3']

Shuohu Final Thoughts

"Looks great in the tank."

Com is the only place I trust for my tanks. I may have even used too much rock but I love how the scape came out with this rock. When I opened the box I was so surprised and shocked. Loved what I got, highly reccomend these. Perfect to go around my water feature in my garden. I hate negative reviews for awesome items just because the buyer didn't read! The price for the quantity of rock kind of drives me nuts.

Overall Score
3.3

[star rating="3.3"]
(8 Points)

10. SevenSeaSupply 10 lbs. Ohko Dragon Stone Rock Mixed Sizes

User Ratings: 75 4

SevenSeaSupply First Impressions

"Nice big pieces of slate."

The bag I received was 17lbs and the rocks were in good condition. Bought 2 then I needed more so got one more. Worth every penny, my nano looks great. Very surprised with how many rocks came with this order. Super happy with what, only downside is I should've bought 2. Overall, a great natural-looking stone in an aquarium. Overall, a great natural-looking stone in an aquarium.

  • SevenSeaSupply 10 lbs. Ohko Dragon Stone Rock Mixed Sizes
  • Add natural beauty to your aquarium or terrarium with this stunning rockwork
  • Japanese Ohko Stone is lightweight and usually tan-colored. Stone needs a good wash before used
  • This exotic-looking rock features numerous holes and caverns formed by erosion
  • Pictures are for references only. This is an order up to 10 lbs. of mixed & assortment size stone
  • Please select SevenSeaSupply as a seller to ensure product quality and free product sample in every order. Rinsing with non-chlorinated water is recommended before placing these rocks in an aquarium
  • Manufacture: SevenSeaSupply
  • Editor's Impressions Of The SevenSeaSupply
  • Quality [star rating='4.8']
  • Value For Money [star rating='3.7']
  • Affordability [star rating='5']

SevenSeaSupply Final Thoughts

"Nice big pieces of slate."

This isn't even all of them in the photo. Items delivered match the product description perfectly. Not sure why but I just expected more. I got a nice large piece that was about six or eight inches wide. My cichlid love hiding under the caves. I was very pleasantly surprised with these dragon stones. It's a good price for what you get.

Overall Score
4.5

[star rating="4.5"]
(86 Points)

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