---
product_id: 25763443
title: "Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz"
brand: "atm aquarium products"
price: "454 kr"
currency: ISK
in_stock: false
reviews_count: 8
url: https://www.desertcart.is/products/25763443-blue-shark-formerly-atm-colony-marine-rapid-cycle-25-gal
store_origin: IS
region: Iceland
---

# Proven effectiveness 25 gal capacity 8 oz formula Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz

**Brand:** atm aquarium products
**Price:** 454 kr
**Availability:** ❌ Out of Stock

## Summary

> 🌊 Dive into Instant Success!

## Quick Answers

- **What is this?** Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz by atm aquarium products
- **How much does it cost?** 454 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/25763443-blue-shark-formerly-atm-colony-marine-rapid-cycle-25-gal)

## Best For

- atm aquarium products enthusiasts

## Why This Product

- Trusted atm aquarium products brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast-Acting Formula:** No waiting weeks—start your marine adventure now!
- • **Commercially Approved:** Trusted by aquariums worldwide for reliable results.
- • **True Nitrifying Power:** Experience the difference with genuine nitrifying bacteria.
- • **Cycle Your Tank Instantly:** Add fish the same day with confidence!
- • **Authentic Bacteria Strains:** Contains Nitrococcus & Nitrosococcus for optimal ammonia control.

## Overview

The Blue Shark Colony Marine Rapid Cycle is an 8 oz tank cycling solution designed for 25-gallon marine environments. It features authentic nitrifying bacteria strains, ensuring effective ammonia and nitrite consumption, allowing you to add fish the same day. Approved by commercial aquariums, this product guarantees a fast and reliable cycling process.

## Description

Colony True Nitrifying bacteria is the industry standard in aquarium cycling, used by public aquariums around the world such as Sea Life Sanctuaries to cycle aquatic systems in days instead of weeks.

## Features

- CYCLES: The one that works, effectively imports actual true nitrifying bacteria
- AUTHENTIC: Other products don't contain the right species of bacteria, Colony Freshwater does!
- STRAINS: Nitrococcus & Nitrosococcus for primary ammonia and nitrite consumption in the marine environment
- INSTANT: Add fish same day, not weeks later
- PROVEN: Used and approved by commercial aquariums

## Images

![Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz - Image 1](https://m.media-amazon.com/images/I/61EbARPPwHL.jpg)
![Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz - Image 2](https://m.media-amazon.com/images/I/61cj0x64k8L.jpg)
![Blue Shark (Formerly ATM) Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz - Image 3](https://m.media-amazon.com/images/I/61HhMoU8IVL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    This work great!
  

*by R***Y on Reviewed in the United States on June 16, 2023*

This is the only stuff I’ll use when starting a new tank or adding more fish. 10/10!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works great!
  

*by K***D on Reviewed in the United States on February 24, 2023*

Isn’t as expensive as the others, and just as good if not better.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Long time
  

*by B***L on Reviewed in the United States on February 6, 2021*

Not show greatMatch oh greatNot show great

## Frequently Bought Together

- ATM Blue Shark (Formerly Colony Marine Rapid Cycle 25 gal Tank Cycle 8 oz
- iQuatics Ocean Reef Pro Marine Saltwater Coral Premium Aquarium Salt - 10KG - Refill

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**Shop now:** [https://www.desertcart.is/products/25763443-blue-shark-formerly-atm-colony-marine-rapid-cycle-25-gal](https://www.desertcart.is/products/25763443-blue-shark-formerly-atm-colony-marine-rapid-cycle-25-gal)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-01*