--- product_id: 53908553 title: "ATM Blue Shark (Formerly Colony Freshwater Rapid Cycle 200 gal Tank Cycle 32 oz" brand: "atm" price: "R1737" currency: ZAR in_stock: true reviews_count: 8 category: "Atm" url: https://www.desertcart.co.za/products/53908553-atm-blue-shark-formerly-colony-freshwater-rapid-cycle-200-gal store_origin: ZA region: South Africa --- # Cycles tank in days, not weeks Instant fish addition same day Authentic Nitrosomonas & Nitrobacter strains ATM Blue Shark (Formerly Colony Freshwater Rapid Cycle 200 gal Tank Cycle 32 oz **Brand:** atm **Price:** R1737 **Availability:** βœ… In Stock ## Summary > πŸš€ Fast-track your aquarium’s health with the power of true nitrifying bacteria! ## Quick Answers - **What is this?** ATM Blue Shark (Formerly Colony Freshwater Rapid Cycle 200 gal Tank Cycle 32 oz by atm - **How much does it cost?** R1737 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/53908553-atm-blue-shark-formerly-colony-freshwater-rapid-cycle-200-gal) ## Best For - atm enthusiasts ## Why This Product - Trusted atm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Trusted by Pros:** Used and approved by commercial aquariums worldwide 🌍 - β€’ **Rapid Cycle Power:** Transform your aquarium in days, not weeks ⚑ - β€’ **Instant Fish Ready:** Add fish the same day without waiting 🐠 - β€’ **Safe & Easy Application:** Simple liquid formula, just add and go πŸ’§ - β€’ **Scientifically Proven Strains:** Only true nitrifying bacteria for effective ammonia & nitrite control 🧬 ## Overview ATM Blue Shark delivers authentic Nitrosomonas and Nitrobacter bacteria strains that rapidly cycle freshwater tanks in days, enabling immediate fish addition. Trusted by commercial aquariums globally, this 32 oz liquid treatment ensures effective ammonia and nitrite control for a healthy aquatic environment. ## Description Product 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. Ingredients Nitrifying Bacteria Directions Add product to tank, then add fish Review: Does what it says on the bottle - Only thing I can complain about is it came in pouch container not a bottle, other than that it's amazing stuff Review: Amazing - What can I say ... this product has literally saved my fish and my sanity. Really does what it says . ## Features - Harmful if swallowed. - Use biocides safely. Always read the label and product information before use. - 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: Nitrosomonas & Nitrobacter for primary ammonia and nitrite consumption in the freshwater environment - INSTANT: Add fish same day, not weeks later - PROVEN: Used and approved by commercial aquariums ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BS97WU8 | | Best Sellers Rank | 75,193 in Pet Supplies ( See Top 100 in Pet Supplies ) 753 in Aquarium Water Treatments | | Brand | ATM | | Brand Name | ATM | | Country Of Origin | United Kingdom | | Customer Reviews | 4.5 out of 5 stars 50 Reviews | | Global Trade Identification Number | 00870317004066 | | Included Components | Nitrifying Bacteria | | Item Form | Liquid | | Item Type Name | aquarium treatment | | Item Weight | 2 Pounds | | Item form | Liquid | | Item weight | 2 Pounds | | Liquid Volume | 32 Fluid Ounces | | Liquid volume | 32 Fluid Ounces | | Manufacturer | Blue Shark LLC | | Manufacturer Part Number | 870317004070 | | Model Number | 870317004070 | | Pet Type | Fish | | Target Species | Fish | | UPC | 870317004066 | | Unit Count | 946.0 millilitre | | Unit count | 946.0 millilitre | ## Product Details - **Brand:** ATM - **Item form:** Liquid - **Item weight:** 907 g - **Liquid volume:** 32 Fluid Ounces - **Manufacturer:** Blue Shark LLC ## Images ![ATM Blue Shark (Formerly Colony Freshwater Rapid Cycle 200 gal Tank Cycle 32 oz - Image 1](https://m.media-amazon.com/images/I/71AC0kh7kHL.jpg) ![ATM Blue Shark (Formerly Colony Freshwater Rapid Cycle 200 gal Tank Cycle 32 oz - Image 2](https://m.media-amazon.com/images/I/719RPOodMFL.jpg) ## Questions & Answers **Q: Can I use api stress coat with atm colony?** A: Yes, I have done so for over 12 months without any problems. Very good product that works well for me. Found a few that claimed they cycle tanks, but this one actually works **Q: How do i use this properly as a fish in cycle had the fish in the tank about 9 weeks cycle crashed now with high amonia. Have done water changes so fa** A: Just add to the tank and the cycle starts in just a few days **Q: I’m using atm colony freshwater in a 90 gallon tank with goldfish . i’m on day 3 . do i need to add more colony on day 5 after water change?** A: I would add a dose when you change water as the bacteria might not yet have settled in the filter and on the gravel enough. **Q: How good is this? do I need to add just to the tank or specifically to the filter?** A: It worked really well for me after months of trying to find a liquid that kick starts the cycle. Just add to the tank itself ## Customer Reviews ### ⭐⭐⭐⭐⭐ Does what it says on the bottle *by P***. on 20 February 2024* Only thing I can complain about is it came in pouch container not a bottle, other than that it's amazing stuff ### ⭐⭐⭐⭐⭐ Amazing *by W***Y on 27 November 2019* What can I say ... this product has literally saved my fish and my sanity. Really does what it says . ### ⭐⭐⭐⭐⭐ Easy to use *by D***S on 23 May 2020* Works great solved my tank water problems --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/53908553-atm-blue-shark-formerly-colony-freshwater-rapid-cycle-200-gal](https://www.desertcart.co.za/products/53908553-atm-blue-shark-formerly-colony-freshwater-rapid-cycle-200-gal) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-05*