---
product_id: 57003818
title: "Two Little Fishies STAX by 5 lb"
brand: "two little fishies"
price: "AR$177881"
currency: ARS
in_stock: true
reviews_count: 9
category: "Two Little Fishies"
url: https://www.desertcart.com.ar/products/57003818-two-little-fishies-stax-by-5-lb
store_origin: AR
region: Argentina
---

# Marine & freshwater safe Flat, stackable limestone 100% natural & sustainable Two Little Fishies STAX by 5 lb

**Brand:** two little fishies
**Price:** AR$177881
**Availability:** ✅ In Stock

## Summary

> 🪨 Stack Your Style, Sustainably. Make Waves with Every Layer!

## Quick Answers

- **What is this?** Two Little Fishies STAX by 5 lb by two little fishies
- **How much does it cost?** AR$177881 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/57003818-two-little-fishies-stax-by-5-lb)

## Best For

- two little fishies enthusiasts

## Why This Product

- Trusted two little fishies brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Chic & Chemical-Free:** Crafted from 100% natural, sustainably collected limestone—no additives, no pests, just pure reef-safe beauty.
- • **Ready-to-Use Convenience:** No curing needed—just rinse and stack. Comes in a generous 5 lb pack with varied sizes for endless design possibilities.
- • **Creative Freedom Unleashed:** Shape caves, ledges, and overhangs with STAX and aquarium epoxy—turn your tank into a living art piece that sparks envy.
- • **Effortless Aquascaping Mastery:** Flat, porous limestone pieces designed for secure, gravity-defying stacking—build your dream underwater landscape with ease.
- • **Versatile Habitat Compatibility:** Perfectly suited for both marine and freshwater aquariums, ensuring your aquatic ecosystem thrives in style.

## Overview

Two Little Fishies STAX offers 5 lbs of flat, porous oolitic limestone rocks, expertly cut for easy stacking in marine or freshwater aquariums. Sustainably sourced and pest-free, these natural stones enable creative, stable aquascapes without any chemical additives. Ideal for building layered structures, caves, and coral bases, STAX rocks come ready to use, empowering aquarists to craft unique underwater landscapes with professional flair.

## Description

Build striking, unique aquascapes in your aquarium with Two Little Fishies STAX Aquascaping Rocks. STAX are flat, porous, oolitic limestone shapes, perfect for building layered aquascapes in marine or freshwater aquariums. Provides a stable structure and limitless creative fun! Each STAX rock is cut so that it has flat surfaces on both sides, allowing for easier and more secure stacking. STAX are made from 100% natural, sustainably collected limestone -- no chemicals or additives to worry about. These pest-free, reef-safe rocks are ready to go into your aquarium. Use with STIX cement to make open, gravity-defying structures, caves, ledges, and overhangs with lots of horizontal surfaces for attaching live corals. Used with AquaStik or CorAffix, STAX are also the perfect base for coral frags. . Most of the pieces range in size anywhere from 3" x 4" to 4" x 6". STAX rocks are ready to use, no curing necessary. Offering is for 5lbs of STAX.

Review: Great to work with - The pieces are nicely shaped and easy to bust up into smaller ones if necessary with just a hammer's tap. Your imagination and aquarium epoxy is the only thing you need now to make some interesting shapes.
Review: Great product - We were very skeptical purchasing this product, based on the reviews, but we tried it anyways. We have purchased a few times and every time we have been more than satisfied. The box seems to contain more than the advertised 5 lbs. There is a nice selection of big and small pieces, fitting for building towers and productive landscapes. Just ordered another 2 boxes. The price is right. Rinse it well, there is dust due to shipping. It is a good product. Thanks.

## Features

- Flat, porous oolitic limestone is great for building layered aquascapes
- Perfect for marine or freshwater aquariums
- 100% natural and sustainably collected

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073DL2N2B |
| ASIN  | B073DL2N2B |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #76,103 in Pet Supplies ( See Top 100 in Pet Supplies ) #95 in Aquarium Décor Rocks |
| Brand Name | Two Little Fishies |
| Breed Recommendation | Small Breeds |
| Customer Reviews | 4.3 4.3 out of 5 stars (311) |
| Date First Available | June 27, 2017 |
| Date First Available  | June 27, 2017 |
| Directions | Place the STAX rocks in the aquarium. |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 2 x 6.2 x 2 inches |
| Item Package Dimensions L x W x H | 8.4 x 7 x 6.5 inches |
| Item Weight | 2.27 Kilograms |
| Item model number | STA5 |
| Item model number  | STA5 |
| Manufacturer | Two Little Fishies |
| Manufacturer  | Two Little Fishies |
| Number of Items | 1 |
| Product Dimensions  | 2 x 6.2 x 2 inches; 5 Pounds |
| Size | 5 Pound (Pack of 1) |
| Target Audience Keyword | fish |

## Product Details

- **Age Range (Description):** All Life Stages
- **Brand:** Two Little Fishies
- **Flavor:** Unflavored
- **Item Form:** Stick
- **Special Ingredients:** Limestone

## Images

![Two Little Fishies STAX by 5 lb - Image 1](https://m.media-amazon.com/images/I/51ZW3CMPCxL.jpg)

## Questions & Answers

**Q: What kind of sand will i need**
A: I think you should google "how to choose aquarium substrate".  I'm far from an expert but many factors go into choosing like: is your tank freshwater or saltwater, do your fish need to burrow, do your fish like to sift the substrate, are you going to keep plants in the tank. Once you set up a tank, the substrate will probably be the hardest thing to change. Good luck!

**Q: How much & big is 5 lbs?**
A: I’ve bought about 5-6 separate 5 pound boxes. 
Each box holds about 5-7 medium size rocks. 4-7 inches in size. Great rock to scape with easy to work with.

**Q: Is this real limestone? Im hoping it will help raise the ph and harden the water in my aquarium**
A: Yes, it's oolitic limestone, they just cut it to make the stax shapes.

**Q: How many boxes are good for 12 gallons?**
A: If there are no other rocks already in the tank, I would use 2-3 boxes.  It is better to have extras than look barren.  I supplemented my 55 gallon tank with just one box but I had four large rocks in already.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great to work with
*by M***D on January 14, 2025*

The pieces are nicely shaped and easy to bust up into smaller ones if necessary with just a hammer's tap. Your imagination and aquarium epoxy is the only thing you need now to make some interesting shapes.

### ⭐⭐⭐⭐⭐ Great product
*by G***R on April 21, 2020*

We were very skeptical purchasing this product, based on the reviews, but we tried it anyways. We have purchased a few times and every time we have been more than satisfied. The box seems to contain more than the advertised 5 lbs. There is a nice selection of big and small pieces, fitting for building towers and productive landscapes. Just ordered another 2 boxes. The price is right. Rinse it well, there is dust due to shipping. It is a good product. Thanks.

### ⭐⭐⭐⭐ Great Rocks!
*by V***A on May 8, 2025*

Bought 5lbs to try in my Fluval 13.5 tank loved them so much bought 10lbs more. 5lb box was packaged with extra care causing minimal breaking during delivery. I only wish the same care was used to package the 10lb box but I was still happy with the contents.

## Frequently Bought Together

- Two Little Fishies STAX by 5 lb
- Instant Ocean HoldFast Epoxy Stick, Fish Safe 4 oz
- Oceans Wonders Coralline Purple Reef Safe Epoxy Putty

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-02-26*