--- product_id: 6990731 title: "Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre" brand: "two little fishies" price: "4836649₫" currency: VND in_stock: true reviews_count: 9 category: "Two Little Fishies" url: https://www.desertcart.vn/products/6990731-two-little-fishies-atlcdx2rtg-carbon-dioxide-absorption-media-for-aquarium store_origin: VN region: Vietnam --- # Stabilizes aquarium pH balance 3L high-capacity CO2 absorption Easy install with CDX adaptors Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre **Brand:** two little fishies **Price:** 4836649₫ **Availability:** ✅ In Stock ## Summary > 🌿 Keep your aquarium thriving—because your fish deserve the best! ## Quick Answers - **What is this?** Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre by two little fishies - **How much does it cost?** 4836649₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/6990731-two-little-fishies-atlcdx2rtg-carbon-dioxide-absorption-media-for-aquarium) ## 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 - • **Compact & Efficient:** Lightweight granules designed for maximum surface area and absorption efficiency without bulk. - • **Combat Low pH Issues:** Effectively reduces carbon dioxide buildup that causes harmful pH drops in closed environments. - • **Trusted by Aquarists:** Highly rated with 4.2 stars and proven results to keep your aquatic ecosystem thriving. - • **Maximize Aquarium Health:** 3 liters of premium CO2 absorption media to maintain optimal pH levels effortlessly. - • **Plug & Play Installation:** Seamlessly fits into your PhosBan reactor and protein skimmer air intake with included CDX adaptors. ## Overview Two Little Fishies ATLCDX2RTG is a 3-liter carbon dioxide absorption media designed to stabilize aquarium pH by reducing CO2 buildup. It installs easily in PhosBan reactors and protein skimmer air intakes using CDX adaptors, ensuring a healthier aquatic environment. Trusted by hobbyists with a 4.2-star rating, this lightweight granule media is a must-have for maintaining balanced water chemistry in closed indoor aquariums. ## Description Many aquariums suffer from low-ph issues. Sometimes it's the carbon dioxide that accumulates in the air in closed buildings that won't let the ph of your aquarium stay up. Twolittlefishies have the solution, it's called cdx, a carbon dioxide adsorption system Review: excellent - thanks!! Review: Five Stars - Very good product, give the result I want ## Features - Two little fishies carbon dioxide absorption media 3litre - Many aquariums suffer from low-ph issues - Simply install cdx media in a phosban reactor and connect it to the air intake of your protein skimmer with the cdx adaptors ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008S9XK2K | | ASIN | B008S9XK2K | | Best Sellers Rank | #145,040 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,261 in Aquarium Water Treatments | | Brand Name | Two Little Fishies | | Customer Reviews | 4.2 4.2 out of 5 stars (39) | | Date First Available | August 3, 2012 | | Global Trade Identification Number | 00748172402320 | | Item Form | Granules | | Item Weight | 0.02 Pounds | | Item model number | 748172402320 | | Liquid Volume | 3 Liters | | Manufacturer | TOPF0 | | Manufacturer | TOPF0 | | Manufacturer Part Number | 748172402320 | | Model Number | 748172402320 | | Product Dimensions | 0.02 x 0.02 x 0.02 inches; 0.32 ounces | | Target Species | Fish | | UPC | 748172402320 | ## Product Details - **Brand:** Two Little Fishies - **Item Form:** Granules - **Item Weight:** 0.02 Pounds - **Liquid Volume:** 3 Liters - **Manufacturer:** TOPF0 ## Images ![Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre - Image 1](https://m.media-amazon.com/images/I/81JPTYjMtEL.jpg) ![Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre - Image 2](https://m.media-amazon.com/images/I/91G8LHggKXL.jpg) ![Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre - Image 3](https://m.media-amazon.com/images/I/31b503Tau5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ excellent *by J***Y on January 9, 2021* thanks!! ### ⭐⭐⭐⭐⭐ Five Stars *by H***E on May 19, 2015* Very good product, give the result I want ### ⭐⭐⭐⭐ Works perfectly, but medical-grade bulk lime is a better long-term value *by J***Y on February 7, 2026* PERFORMANCE & RELIABILITY ​• This CO₂ absorbent from Two Little Fishies performs exactly as advertised for my reef tank. ​The color change is distinct and provides a reliable visual indicator for replacement if you aren't monitoring your levels digitally. ​THE "AQUARIUM MARKUP" (CRITICAL COST ANALYSIS) ​• While the performance is solid, the primary drawback is the price-to-volume ratio. ​• Technical Note: This is marketed specifically for aquarium use, which carries a noticeable "specialty" markup. For heavy, long-term maintenance, the cost of these smaller containers adds up quickly. ​TECHNICAL WORKAROUND: GOING BULK ​• If you find yourself going through these quickly, I’ve found it much more economical to switch to medical-grade soda lime sold in bulk (like the 38 lb. buckets). ​• I have a separate review on the medical-grade bulk option where I’ve shared data from my pH monitor showing it performs identically for a fraction of the cost per pound. ​FINAL VERDICT ​• This is a quality product that does exactly what it says on the bucket. However, because it isn't the most economical choice for long-term use, it loses a star for value. If you're a heavy user, it’s worth the effort to source medical-grade bulk alternatives. ## Frequently Bought Together - Two Little Fishies ATLCDX2RTG Carbon Dioxide Absorption Media for Aquarium, 3-Litre - IceCap CO2 Scrubber Large - IceCap Color Changing CO2 Absorbent Media 1kg --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/6990731-two-little-fishies-atlcdx2rtg-carbon-dioxide-absorption-media-for-aquarium](https://www.desertcart.vn/products/6990731-two-little-fishies-atlcdx2rtg-carbon-dioxide-absorption-media-for-aquarium) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-19*