---
product_id: 3670504
title: "CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life"
brand: "carib sea"
price: "2884 Lei"
currency: RON
in_stock: true
reviews_count: 13
url: https://www.desertcart.ro/products/3670504-caribsea-south-sea-base-rock-for-aquarium-40-lb-natural
store_origin: RO
region: Romania
---

# Optimized for saltwater tanks Puzzle-piece fit for stable aquascapes 40 lb natural base rock CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life

**Brand:** carib sea
**Price:** 2884 Lei
**Availability:** ✅ In Stock

## Summary

> 🪸 Build your dream reefscape with confidence and style!

## Quick Answers

- **What is this?** CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life by carib sea
- **How much does it cost?** 2884 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/3670504-caribsea-south-sea-base-rock-for-aquarium-40-lb-natural)

## Best For

- carib sea enthusiasts

## Why This Product

- Trusted carib sea brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ecosystem Enhancer:** Provides extensive surface area for beneficial organisms, promoting a balanced, thriving aquarium.
- • **Modular Rock Design:** Interlocking shapes allow secure stacking without adhesives, preventing tank topple risks.
- • **Solid 40 lb Foundation:** Generous weight perfect for large saltwater tanks and expansive reef builds.
- • **Crystal Clear Stability:** Helps maintain stable water chemistry, ensuring a healthy habitat for your marine collection.
- • **Saltwater-Ready Composition:** Engineered to create a natural marine environment that supports vibrant aquatic life.

## Overview

CaribSea South Sea Base Rock is a 40 lb pack of natural, saltwater-optimized rock designed for aquascaping in marine tanks. Its puzzle-piece shapes enable secure, glue-free stacking, creating stable, dynamic underwater landscapes. This base rock supports beneficial organisms and helps maintain stable water conditions, making it ideal for large saltwater aquarium setups seeking both aesthetic appeal and ecosystem health.

## Description

desertcart.com : CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life : Aquarium Decor Rocks : Pet Supplies

Review: Great Rock! - This product is well worth the price. It is man made rock and a great beginning substitute for live rock. Make sure to rinse well and it can go straight into your aquarium. It can be made into live rock over time and is a perfect addition to a basic saltwater aquarium. It comes with many medium size 5 by 8 inch rocks, It was enough to create a nice reef wall in a 75 gallon tank. I would definitely buy it again!
Review: Great rock. - Just purchased two boxes of this rock for my new 125 gallon saltwater tank set up and I am really loving the look of it. I have always purchased live rock for the beneficial aspects of it, but recently my live rock purchases have come with unwelcome hitchhikers which is irritating after a while. Live rock can also be a task to position in your tank without toppling over. This rock goes together like puzzle pieces and I feel as though I will not have to worry as much about my hippo tang being crushed by toppling rocks since she loves to nestle herself in between crevices (I do not like to glue live rock together because I move it around too much due to corals). For the most part I received some pretty large pieces (by large I would say football size) but that was no problem for me as I have a larger tank. You can also use a hand saw to cut down the rock if you so choose. I did start to clean off the rock before placing it into my tank, but all that is on the rock is sand so that will obviously settle after a while. If you are adding this to an already established tank I think I would take the time to clean that extra sand off so your tank is not cloudy for hours. Two of the rocks came broken but honestly it did not hurt anything; I placed the larger part on the sand bed and used the smaller part to stack. I even had small broken pieces at the bottom of the box that I was happy about because I can glue corals to them in the future.

## Features

- Perfect for Saltwater Aquariums: CaribSea South Sea Base Rock creates a natural, realistic environment for marine life in your saltwater aquarium.
- Ideal for Aquascaping: Provides a versatile foundation for building dynamic rock structures in your tank, enhancing your aquascaping designs.
- Supports Beneficial Organisms: Offers ample surface area for organisms to settle, creating a balanced ecosystem and promoting aquarium health.
- Maintains Stable Water Conditions: Helps maintain stable water conditions, contributing to a healthy, thriving aquarium environment.
- Perfect for Larger Setups: The 40 lb package is ideal for larger tanks, offering plenty of material for creating stunning underwater landscapes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0017JBX7M |
| ASIN  | B0017JBX7M |
| Age Range Description | all stages |
| Best Sellers Rank | #142,950 in Pet Supplies ( See Top 100 in Pet Supplies ) #195 in Aquarium Décor Rocks |
| Brand Name | Carib Sea |
| Color | white |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,135) |
| Date First Available | April 8, 2008 |
| Date First Available  | April 8, 2008 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | Adults 18 Years and older: This product is to be used once a day (every 24 hours), every day for 14 days. It may take 1 to 4 days for full effect, although some people get complete relief of symptoms within 24 hours |
| Included Components | all |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 1 x 1 x 1 inches |
| Item Package Dimensions L x W x H | 17.75 x 15 x 14 inches |
| Item Weight | 16 ounces |
| Item model number | 00370 |
| Item model number  | 00370 |
| Manufacturer | TopDawg Pet Supply |
| Manufacturer  | TopDawg Pet Supply |
| Material | Plastic |
| Model Name | …. |
| Number of Items | 1 |
| Product Dimensions  | 1 x 1 x 1 inches; 1 Pounds |
| Size | 40lb (Pack of 1) |
| Specific Uses for Product | Active |
| Target Audience Keyword | Fish, amphibians |
| Warranty Description | Warranty |

## Images

![CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life - Image 1](https://m.media-amazon.com/images/I/71PTGRfnNTL.jpg)
![CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life - Image 2](https://m.media-amazon.com/images/I/81W6qarCNlL.jpg)
![CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life - Image 3](https://m.media-amazon.com/images/I/81pEgNH9P2L.jpg)
![CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life - Image 4](https://m.media-amazon.com/images/I/91CUmRBFOGL.jpg)
![CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life - Image 5](https://m.media-amazon.com/images/I/91Suhvha-wL.jpg)

## Questions & Answers

**Q: Anyone  ever try to drill holes in this stuff?  i desire to drill lots of 1/4 inch holes to sink some living color coral in....**
A: I've drilled multiple holes into the material. Very easy to do with masonry drill bits. Placed into bucket of RODI water and used multiple sizes. Video shows some of the holes. Very great product. Highly recommend.

**Q: I have 150 gallon freshwater tank looking for large decor. I have 20"pleco mollies, platty, guppies, loaches, mixed catfish. Would you recommend this?**
A: The short answer is no.  Rock is really good for saltwater because it raises kh along with the biological filtration benefits.  Using these rocks in a freshwater tank without letting them soak for an extreme amount of time (like 6 months to make sure that all the soft rock has broken down) could seriously impact a freshwater tank with scaleless fish.  With loaches and I assume scaleless cats, you must know how sensitive your fish are to high kh and kh spikes so I would recommend avoiding base / reef rock like the plague.  The best decorations for freshwater are river rock / lava rock and driftwood.  I have two large pieces of driftwood and some slate + river rock in my FW ciclid tank and my experience supports the idea that driftwood can help soften the water a bit.  Remember that plecos and loaches love driftwood and will feed on the algae that grows on it.  I have friends who have had success replication the look of base rock with lava rock but do some research about how the rock can change your water chemistry.

**Q: What is the shelf life for these rocks? I mean how long you can keep them without using them in the tank**
A: These are not live rocks so they last as long as any rock... Hope this answered your question. They are dead dry rocks

**Q: Is this 1 40 lb dry rock, or 40 lbs of dry rock?**
A: It’s 40 pounds of assorted sizes of base rock. It can vary a lot, one time it was basically just 3 large rocks, other times I’ve ordered it it’s 8-10 pieces of various sizes.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Rock!
*by S***N on September 13, 2024*

This product is well worth the price. It is man made rock and a great beginning substitute for live rock. Make sure to rinse well and it can go straight into your aquarium. It can be made into live rock over time and is a perfect addition to a basic saltwater aquarium. It comes with many medium size 5 by 8 inch rocks, It was enough to create a nice reef wall in a 75 gallon tank. I would definitely buy it again!

### ⭐⭐⭐⭐⭐ Great rock.
*by A***A on March 31, 2015*

Just purchased two boxes of this rock for my new 125 gallon saltwater tank set up and I am really loving the look of it. I have always purchased live rock for the beneficial aspects of it, but recently my live rock purchases have come with unwelcome hitchhikers which is irritating after a while. Live rock can also be a task to position in your tank without toppling over. This rock goes together like puzzle pieces and I feel as though I will not have to worry as much about my hippo tang being crushed by toppling rocks since she loves to nestle herself in between crevices (I do not like to glue live rock together because I move it around too much due to corals). For the most part I received some pretty large pieces (by large I would say football size) but that was no problem for me as I have a larger tank. You can also use a hand saw to cut down the rock if you so choose. I did start to clean off the rock before placing it into my tank, but all that is on the rock is sand so that will obviously settle after a while. If you are adding this to an already established tank I think I would take the time to clean that extra sand off so your tank is not cloudy for hours. Two of the rocks came broken but honestly it did not hurt anything; I placed the larger part on the sand bed and used the smaller part to stack. I even had small broken pieces at the bottom of the box that I was happy about because I can glue corals to them in the future.

### ⭐⭐⭐⭐⭐ Cool!
*by S***N on January 8, 2025*

These are Awesome! Used in my 20 gallon High with Freshwater Angelfish (for size reference). I followed advice from another review and rinsed really well then let it sit 24 hrs with seachem prime (or any conditioner for tap water) in separate bucket before adding to tank. Color is great, came with many pieces to build my little structure! Alot for 10 lbs , Great deal and quality!

## Frequently Bought Together

- Carib Sea ACS00370 South Sea Base Rock for Aquarium, 40-Pound
- Seachem 67131150 Reef Glue Cyanoacrylate Gel Coral Frag Mounting, 20g
- Seachem Ammonia Alert for Freshwater and Marine Fish

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-12*