Editor's Choice - Our Favorite Large Aquarium Décor Rocks

1. Pisces 17lb Seiryu Rock for Aquascaping, Aquariums, Terrariums, Vivariums

User Ratings: 76 3

Pisces AM-ROCK001 First Impressions

"This rock is beautiful!"

I got a nice large piece that was about six or eight inches wide. I'm pretty happy with the rock I received. They are the perfect little hideaways for them! I am looking forward to getting my tank stocked up! The holed rock formation is a nice design, but the material being is way too thin. Great product and it will definitely be buying more. Com tell them I sent you for an extra not a damn thing at check out.

  • Pisces 17lb Seiryu Rock for Aquascaping, Aquariums, Terrariums, Vivariums
  • age_range_description: All Life Stages
  • included_components: Approximately 1 x large piece, 2 x medium pieces, 3 - 4 small pieces.
  • Rinse before use
  • Manufacture: Pisces USA
  • Product Dimensions: 5.5 x 11.81 x 5.5 inches; 17 Pounds
  • Editor's Impressions Of The Pisces AM-ROCK001
  • Quality [star rating='4']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.6']

Pisces AM-ROCK001 Final Thoughts

"Great quality product."

So glad I bought these for my tank. I purchased these for decor for my aquarium and I adore how they turned out. It's not difficult but you need rinse over and over to get the water clear. The rocks were REALLY dusty, covers with a lot of clay. I thought the price was great for the quantity and quality as well. Def need to clean before putting in your tank. I got these for a betta sorority tank.

Overall Score
4.5

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

Peoples Choice - Other Highly Rated Large Aquarium Décor Rocks

2. Hewnda Gorgeous Aquarium Decorated with Aquarium Decorations Glass Beads Aquarium, 1 Pound of Enough...

User Ratings: 65 8

Hewnda First Impressions

"Can even stand alone."

Also, if you need any manzanita or any other driftwood. They are making these by sloshing resin around in a mold, so it's really thin. I really hope they upload the other 3 pictures. Cleaned the dust and clay residue off under running water and some brushing. Stones were perfect for my 5 gallon planted tank. The big rocks and theses small ones go perfect together. The water deactivates it and makes it safe.

  • Hewnda Gorgeous Aquarium Decorated with Aquarium Decorations Glass Beads Aquarium, 1 Pound of Enough Decorative Gravel Rock Gravel Pebbles gem
  • 【Material】 glass material, high temperature firing, never fade.
  • 【Specifications】 each about 1.5 * 2.5 cm, enough heavy can sink to the bottom.
  • 【Note】 Please use the water before washing with three or four times, rub back and forth, wash away the dust can be used. Keep the beads away from your child to avoid swallowing.
  • 【Application】 fish tank bottom, flower pots paved, home decoration, dried flowers cuttings
  • A range of can be tiled: (6.7 '× wide 6.7 "or so), so the larger aquarium needs more than 2 packs to make your fish tank become charming.
  • Manufacture: Hewnda
  • Editor's Impressions Of The Hewnda
  • Quality [star rating='5']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='3.4']

Hewnda Final Thoughts

"I will be buying more."

These are just what I needed to creat stone walks in my model railroad park. For an Iwagumi layout, this would be the Oyaishi. They arrived in tact and were all the size described. I placed an order of 10ilbs for my 20g high. Photo 5 is a sample layout for my 45cm tank. I'm always hesitant to buy it online, but this was a good transaction. Just be prepared to buy several bags if you have a 20+ gallon.

Overall Score
4.2

[star rating="4.2"]
(325 Points)

3. Aqualexs Aquarium Ohko Dragon Stone Rock Mixed Sizes

User Ratings: 81 2

Aqualexs First Impressions

"Good amount of glow."

Waiting in my second bag as I'm typing this. I purchased the caves for my 65 gal Lake Tanganyikan tank. I'm pretty happy with the rock I received. Trying shipping this much heavy stone. Waiting in my second bag as I'm typing this. There aren't any large enough to fully cover an entire base however. Great stones, came with 3 various sizes for the 5 lbs option.

  • Aqualexs Aquarium Ohko Dragon Stone Rock Mixed Sizes
  • 5 Pounds of Aquarium Dragon Stone, 100% natural stone, Mixed Size: small - medium, range from 2-6 inches
  • Dragon stone does not alter the water values
  • Safe and great looking rocks for your tank
  • Great for anchoring plants and mosses, creating hiding places for shrimp and small fish
  • Dragon stones are clay-like. No matter how much we washed, it would get dirty during shipping. A quick wash is necessary. Please check out our 20 LBS for best deal and larger stone
  • 5 and 10 lb is great for nano tank( 2 to 10 gallon)
  • 10 to 15 lb is great for Medium size tank ( 10 to 25 gallon)
  • 15 to 20 lb is great for medium to large size tank ( 25 to 55 gallon)
  • Manufacture: Aqualexs
  • Editor's Impressions Of The Aqualexs
  • Quality [star rating='4.8']
  • Value For Money [star rating='4.7']
  • Affordability [star rating='4.3']

Aqualexs Final Thoughts

"Thank you to the seller."

If you are thinking about buying these, DO IT. Just be prepared to buy several bags if you have a 20+ gallon. Com is the only place I trust for my tanks. I used these for Aquarium decor and they look lovely in a planted tank. Was a LOT to clear off the gray dust if using in an aquarium. They match perfectly to my center piece and the cichlids love hiding in them. These are excellent stones and a great buy for the money!

Overall Score
4.7

[star rating="4.7"]
(253 Points)

4. Zilla Decor Rock Lair Size Large

User Ratings: 88 5

Zilla Zilla Decor Rock Lair Size Large First Impressions

"Thank you to the seller."

It looks nice, and my kids had fun choosing which parts to hot glue onto the rock. It's a good price for what you get. I may have even used too much rock but I love how the scape came out with this rock. No I dont work for them and no I dont get anything for saying that. Would definitely love to repurchase this item. I was expecting this to be a thicker resin piece. The resin color is dark, so no repainting needed.

  • Zilla Decor Rock Lair Size Large
  • Side entrance and solid top help hold humidity
  • Realistic and Natural looking
  • Heavy material keeps the hide from moving
  • Rough external texture helps animals shed skin
  • The ZILLA rock lairs are available in 3 SIZES to suit reptiles from tiny Geckos to large snakes and everything in between
  • Manufacture: ZILLA
  • Product Dimensions: 7.2 x 9.17 x 12.91 inches; 7.85 Pounds
  • Editor's Impressions Of The Zilla Zilla Decor Rock Lair Size Large
  • Quality [star rating='5']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='5']

Zilla Zilla Decor Rock Lair Size Large Final Thoughts

"Im very happy."

Great stones, came with 3 various sizes for the 5 lbs option. My cichlid love hiding under the caves. My order came with large and small pieces allowing for some good combinations. After playing with them for awhile now. We ended up with two custom plants in the end, and a nicer custom rock. Perfect to go around my water feature in my garden. Will most likely buy more in the future.

Overall Score
4.7

[star rating="4.7"]
(246 Points)

Honorable Mentions - More Top Selling Large Aquarium Décor Rocks

5. Natural Slate - Large 5 to 7 inch Stones. PH Neutral. Perfect for Aquascaping and Igwami Aquariums, ...

User Ratings: 76 3

Small World Slate & Stone First Impressions

"Worth the buy!"

This isn't even all of them in the photo. I purchased the caves for my 65 gal Lake Tanganyikan tank. I purchased the caves for my 65 gal Lake Tanganyikan tank. They match perfectly to my center piece and the cichlids love hiding in them. These are just what I needed to creat stone walks in my model railroad park. They get tossed around in shipping and chunks break off. I love the look and color of this stone.

  • Natural Slate - Large 5 to 7 inch Stones. PH Neutral. Perfect for Aquascaping and Igwami Aquariums, Reptile and Amphibian Enclosures, Stone Carving & Crafts (10 lbs)
  • 100% real Slate stone proudly sourced in the USA by a small family run business. Each bag is a mix of slate stones from 5 to 7 inches.
  • EXCELLENT for Aquascaping, Igwami aquariums, terrariums, vivariums and other pet enclosures. PH neutral These stones naturally hold heat (from light or other heat source) for amphibians, reptiles or other heat loving pets. They can be glued together with aquarium safe glue or used alone to create caves, cliffs and mountain ranges for pets, fish and plants. Thoroughly rinse all stones before placing in your habitat.
  • BEAUTIFUL for Bonsai, Sekijoju, Suiseki & Ishizuki. Use in home decor in bowls and as ground cover for indoor plants. Perfect size for rock painting and stone carving.
  • PERFECT for creating walkways, benches, steps, archways, caverns, ground cover and much, much more in miniature or fairy gardens, model railroads and doll houses.
  • COLOR - These stones are a natural grey slate that are darker when wet or can be more permanently darkened by using a sealant or clear finish (do not apply any sealant or finish to stones that will be used in aquariums or pet enclosures). Because this is a natural stone, slight color variations including some white quartz veins or brown/rust colored slate may be mixed in. These beautiful variations add natural uniqueness and interest to the stones. Our stones are hand picked, inspected, washed
  • Manufacture: Small World Slate & Stone
  • Item Weight: 10.56 pounds
  • Editor's Impressions Of The Small World Slate & Stone
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.2']

Small World Slate & Stone Final Thoughts

"Highly recommend it."

And placed in a 36 gallon bowfront. I purchased the caves for my 65 gal Lake Tanganyikan tank. Trying shipping this much heavy stone. It was well worth time and effort to get them clean. I'm pretty happy with the rock I received. These are just what I needed to creat stone walks in my model railroad park. Com is the only place I trust for my tanks.

Overall Score
4.6

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

6. Underwater Galleries Cichlid Stones

User Ratings: 65 4

Underwater Galleries 23965 First Impressions

"I ordered 2 sets."

Truly something unique that will appeal to any aquarist. The structure is roughly 14l x 6h x 4d. I got this for my 10 gal and it fits beautifully! The big rocks and theses small ones go perfect together. Just trying to help you find good products for a good price. Def need to clean before putting in your tank. The edges of holes are also sharp, but easy enough to smooth with a razor knife.

  • Underwater Galleries Cichlid Stones
  • Ceramic stones provide a lightweight alternative to real stone in your aquarium
  • Hollow cave provides shelter, hiding spots, and spawning beds for your cichlids
  • Cichlid Stones appeal to various aquarium fish species including plecostomus Overview
  • Easier to move and arrange, plus less likely to damage aquarium glass
  • Easy-to-defend caves provide secure shelter from larger, aggressive fish
  • Underwater Galleries Cichlid Stone
  • Gravel was added to barely coat the bottom
  • Manufacture: TopDawg Pet Supply
  • Product Dimensions: 8.8 x 6 x 5.7 inches; 0.32 Ounces
  • Editor's Impressions Of The Underwater Galleries 23965
  • Quality [star rating='3.9']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.4']

Underwater Galleries 23965 Final Thoughts

"Do the math."

It was plenty for the tank I wanted to scape. If you see black substrate, that was still waiting for the 2nd bag. It was plenty for the tank I wanted to scape. It was well worth time and effort to get them clean. Just be prepared to buy several bags if you have a 20+ gallon. Since it's 17lbs obviously you're going to get mostly small rocks. I really hope they upload the other 3 pictures.

Overall Score
4.3

[star rating="4.3"]
(216 Points)

7. Underwater Galleries AUG6753 10-Pack Big Rock Box

User Ratings: 72 7

Underwater Galleries 380020 First Impressions

"Overall, a good purchase."

I love the stones, but yes, barely enough to cover a corner of my aquarium. The largest of the remaining pieces was moderate sized and makes for a good Soeishi. It's a good price for what you get. I switched up my plans a bit and everything was lovely. Com is the only place I trust for my tanks. Great product and it will definitely be buying more. When I opened the box I was so surprised and shocked.

  • Underwater Galleries AUG6753 10-Pack Big Rock Box
  • Underwater Big Rock Box 10 Piece Ceramic Ornament
  • The 10 Stone Big Rock Box Is Perfect For Larger Aquariums And Hobbyists With Multiple Systems
  • It includes quality crafted Cichlid stone caves, toe-holds and boulders.
  • It Includes Quality Crafted Cichlid Stone Caves, Toe-Holds And Boulders
  • Underwater Big Rock Box 10 Piece Ceramic Ornament
  • The 10 Stone Big Rock Box is perfect for larger aquariums and hobbyists with multiple systems
  • It includes quality crafted Cichlid stone caves, toe-holds and boulders
  • It includes quality crafted Cichlid stone caves, toe-holds and boulders
  • Manufacture: Underwater Galleries
  • Product Dimensions: 0.02 x 0.02 x 0.02 inches; 0.32 Ounces
  • Editor's Impressions Of The Underwater Galleries 380020
  • Quality [star rating='4.3']
  • Value For Money [star rating='3.4']
  • Affordability [star rating='5']

Underwater Galleries 380020 Final Thoughts

"I ordered 2 sets."

My buddy said he found a better deal on etsy. Waiting in my second bag as I'm typing this. Will most likely buy more in the future. Just be prepared to buy several bags if you have a 20+ gallon. No I dont work for them and no I dont get anything for saying that. Absolutely perfect for use in my 20 gallon aquarium. It was well worth time and effort to get them clean.

Overall Score
4.4

[star rating="4.4"]
(93 Points)

8. DR. Moss Cichlid Stone 5 pc Luxury Set - Ceramic Rock Cave Aquarium Decorations - Fish Tank Decor

User Ratings: 51 16

Aquarium Equip First Impressions

"I bought 2 for a 2."

Photo 5 is a sample layout for my 45cm tank. For an Iwagumi layout, this would be the Oyaishi. And I just realized they are using them to hide their babies. I'll order this again, but for now I have more than I need! If you see black substrate, that was still waiting for the 2nd bag. The colors of the rocks are beautiful. I use it in my resin art work and it looks fantastic!

  • DR. Moss Cichlid Stone 5 pc Luxury Set - Ceramic Rock Cave Aquarium Decorations - Fish Tank Decor
  • Provides natural like shelter.Great for bottom dwellers.Perfect for breeding. This aquarium decoration provides visual interest for you and your fish. Holes provide a hideaway for your fish to rest or hide reducing stress and aggression
  • Material Ceramic 100%.Great shelter for plecos,shrimps, small fishes, baby fishes. These cichlid stone replicas are perfect for cichlid tanks since this fish is territorial and must create their own space. These decorative aquarium ornaments mimic what is found in an oceanic environment.
  • Smooth surface can act as a breeding ground for fish. This aquarium decoration is safe for use in both freshwater and saltwater aquariums. Additional stones can be purchased separately to create even larger displays.
  • Design a natural living environment for the fish to shelter or to generate. The material is ceramic,it can filter and purify the water. It is suitable for small bream, cichlids when they need a rest or breed.
  • ▲1 SET of 5 ROCK.▲ Aquarium Ornament Fish Tank Cichlid Stones Multi-Function Beer amid, Breeder, Shelter, Filter, Decoration. Specially made with ceramic material that possess filtration function for aquarium. 100% Brand New and High Quality Please do not hesitate to buy ,any problems we will try our best to help you : )
  • Manufacture: DR. MOSS
  • Product Dimensions: 8 x 6.3 x 2.9 inches; 1.6 Pounds
  • Editor's Impressions Of The Aquarium Equip
  • Quality [star rating='4.5']
  • Value For Money [star rating='3.2']
  • Affordability [star rating='3.9']

Aquarium Equip Final Thoughts

"I have a 75 gallon tank."

I got a nice large piece that was about six or eight inches wide. And placed in a 36 gallon bowfront. Honestly it's a good idea to have some glue on hand anyways. Great stones, came with 3 various sizes for the 5 lbs option. Com is the only place I trust for my tanks. Super happy with what, only downside is I should've bought 2. Great seller, great product, great price!

Overall Score
3.8

[star rating="3.8"]
(62 Points)

9. Natural Slate Aquarium Stones - Extra Large 8 to 10 Inch. PH Neutral. Perfect for Aquascaping and Ig...

User Ratings: 82

Small World Slate & Stone First Impressions

"Very pleased with it."

Don't even hesitate purchasing these stones. There aren't any large enough to fully cover an entire base however. Recieved 8 pieces of stone in my order with minimal chipping. There aren't any large enough to fully cover an entire base however. Com is the only place I trust for my tanks. Dragon stone has a nice reddish tone to it so it really stands out. They are worth very dollar, and a very good price.

  • Natural Slate Aquarium Stones - Extra Large 8 to 10 Inch. PH Neutral. Perfect for Aquascaping and Igwami Aquariums, Nano Tanks and Reptile and Amphibian Enclosures (Approx 16-18 lbs)
  • 100% real Slate stone proudly sourced in the USA by a small family run business. Each box is a mix of slate stones from 8 to 10 inches
  • EXCELLENT for Aquascaping, Igwami aquariums, terrariums, vivariums and other pet enclosures. These stones are PH neutral and will not affect water in your aquarium These stones naturally hold heat (from light or other heat source) for amphibians, reptiles or other heat loving pets. They can be glued together with aquarium safe glue and used to create caves, cliffs and mountain ranges for pets, fish and plants. Thoroughly rinse all stones before placing in your habitat.
  • BEAUTIFUL for Bonsai, Sekijoju & Ishizuki. Perfect for creating walkways, benches, steps, archways, caverns, cliffs and mountains ground cover and much, much more in miniature or fairy gardens and model railroads.
  • EASILY carved with hand tools. Beautiful smooth finish is ideal for creating Japanese Ink Stone, natural stone oil lamps or candle holders and one of a kind art.
  • COLOR - These stones are a natural grey that are darker when wet. Because this is a natural stone, slight color variations including some white quartz veins or brown/rust colored slate may be mixed in. These beautiful variations add natural uniqueness and interest to the stones. Our stones are hand picked, inspected, washed and hand packed to arrive safely.
  • Manufacture: Small World Slate & Stone
  • Item Weight: 20.1 pounds
  • Editor's Impressions Of The Small World Slate & Stone
  • Quality [star rating='4.7']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

Small World Slate & Stone Final Thoughts

"No issues so far though."

I couldn't find these at any of the aquarium stores near me, chain or independent. One bigger chunk and five medium chunks. I've bought quite a few packs to get the volume I needed. 2 small rocks and 4 medium ones and one large stone. I am only giving 4 star because I had no way to request a larger stone after order. Great seller, great product, great price! The only thing that was frustrating was the wait time for the shipping.

Overall Score
4.7

[star rating="4.7"]
(48 Points)

10. Dr.moss Cichlid Grain Stone Cave Aquarium Fish Tank Decoration

User Ratings: 54 12

Dr. Moss First Impressions

"Nothing was damaged."

Overall, a great natural-looking stone in an aquarium. The rocks were REALLY dusty, covers with a lot of clay. I'm always hesitant to buy it online, but this was a good transaction. Love this product did not change colors when water ran over it. I will not be able to get all 7 rocks in my Bio Orb 8 gallon tank. The edges of holes are also sharp, but easy enough to smooth with a razor knife. I placed an order of 10ilbs for my 20g high.

  • Dr.moss Cichlid Grain Stone Cave Aquarium Fish Tank Decoration
  • Provides natural like shelter.Great for bottom dwellers.Perfect for breeding. This aquarium decoration provides visual interest for you and your fish. Holes provide a hideaway for your fish to rest or hide reducing stress and aggression
  • Material Ceramic 100%.Great shelter for plecos,shrimps, small fishes, baby fishes. These cichlid stone replicas are perfect for cichlid tanks since this fish is territorial and must create their own space. These decorative aquarium ornaments mimic what is found in an oceanic environment.
  • Smooth surface can act as a breeding ground for fish. This aquarium decoration is safe for use in both freshwater and saltwater aquariums. Additional stones can be purchased separately to create even larger displays.
  • Design a natural living environment for the fish to shelter or to generate. The material is ceramic,it can filter and purify the water. It is suitable for small bream, cichlids when they need a rest or breed.
  • ▲1 SET of 3 ROCK.▲S Size: 3"*2.5"*3.5" // M Size: 3.1"*3.5"*4.3"// L Size:3.5"*4.7"*4.1"
  • Manufacture: Dr.moss
  • Product Dimensions: 7.9 x 6.2 x 3.5 inches; 8.8 Ounces
  • Editor's Impressions Of The Dr. Moss
  • Quality [star rating='4.9']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='5']

Dr. Moss Final Thoughts

"I love theses."

Great stones, came with 3 various sizes for the 5 lbs option. If you are thinking about buying these, DO IT. Recieved 8 pieces of stone in my order with minimal chipping. These are just what I needed to creat stone walks in my model railroad park. Recieved 8 pieces of stone in my order with minimal chipping. You definitely get a lot of slate for the price. If you are still questioning your purchase please re-read the headline.

Overall Score
4.0

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

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