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FZONE

FZONE 45g Disposable CO2 Cartridges with 5/8'' Threaded Interfaces (2-Pack)

  • Based on 98 reviews
Condition: New
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Availability: In Stock.
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Arrives Wednesday, Sep 23
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Features

  • High-Capacity 45g CO2 Output: FZONE 45g CO2 disposable cartridge provides a larger gas volume than standard 16g/25g cylinders, delivering longer runtime and more stable pressure output. Ideal for applications that require continuous or high-demand CO2 supply without frequent replacement.
  • Standard Threaded Connection (5/8-18 UNF): Equipped with a 5/8'' 18 UNF threads for a secure, leak-proof connection. This cartridge fits most devices that require a 5/8-inch diameter CO2 cylinder. Package includes 2 packs.
  • Wide Range of Applications: Suitable for aquarium CO2 systems, bike tire inflators, inflatable life vests, airbag safety vests, paintball markers, airguns, and other portable gas-powered equipment. Perfect for aquariums, home, outdoor, and hobby use.
  • Disposable & Hassle-Free Design: Pre-filled and ready to use, this single-use CO2 cartridge eliminates the need for refilling or maintenance. Simply install into a compatible device and replace when emptyclean, safe, and effortless operation for everyday or professional use.
  • Premium High-Strength Steel Construction: Made from durable, corrosion-resistant steel and made from 99.99% pure CO2 (non-food grade) for stable pressure performance, ensuring safe and reliable CO2 output across different applications. Caution: Contains gas under high pressure; may explode when heated. Store in a well-ventilated and cool place, protected from direct sunlight.

Package Dimensions ‏ : ‎ 7.09 x 3.9 x 1.73 inches; 14.07 ounces


Item model number ‏ : ‎ 45g


Date First Available ‏ : ‎ March 25, 2025


Manufacturer ‏ : ‎ FZONE


Best Sellers Rank: #14,604 in Pet Supplies (See Top 100 in Pet Supplies) #24 in Aquarium Air Pump Accessories


#24 in Aquarium Air Pump Accessories:


Customer Reviews: 4.7 4.7 out of 5 stars (98)


Item Weight: 14 ounces


Manufacturer: FZONE


Item model number: 45g


Date First Available: March 25, 2025


Item Package Dimensions L x W x H: 7.09 x 3.9 x 1.73 inches


Brand Name: FZONE


Directions: 1


Warranty Description: 1


Model Name: Cartridges


Color: gold


Included Components: Cartridges


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 23

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
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  • Afterpay Financing
  • Zip Pay in 4
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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Works good
Works fine no issues
Reviewed in the United States on August 2, 2026 by Ruben
    • Must buy for diffuser
Good cartidges for my CO2 diffuser. Lasts a few months and good price.
Reviewed in the United States on February 5, 2026 by Daniel Godun
    • easy to use
Love these tiny cartridges. Easy to install and use with the fzone co2 system.
Reviewed in the United States on August 17, 2026 by K10
    • FZONE CO2 system is perfect
Only recently had to purchase another set of cartridges for my FZONE CO2 system. On my 4.6 gallon tank, one cartridge lasts ~3 months.
Reviewed in the United States on March 17, 2026 by Dillon
    • Good product great support
These are good carts I use them all the time but one came empty and sealed, the other was full. They immediately resolved the issue, would definitely buy again, F Zone is the best.
Reviewed in the United States on February 4, 2026 by ReviewStu
    • Amazing customer service, will buy again from FZONE
Review Image by PHRENIC
Review Image by PHRENIC
Review Image by PHRENIC
Had a problem with my regulator not puncturing the seal of the cartridge and I'm astonished how great customer service is when reaching out to FZONE. They help out how to solve the problem and if there wasn’t anything to solve they just replace you with a new regulator.
Reviewed in the United States on August 25, 2026 by PHRENIC
    • Fácil de instalar
Cada tanque dura aproximadamente dos semana a un rate de una burbuja por segundo. Pero son fáciles de usa. Así que no te quitan mucho tiempo
Reviewed in the United States on August 24, 2026 by Victor
    • $30 a month is quite a bit just to CO2 inject my 5 gallon tank.
One cartridge lasts me about 10 days. That's with two bubbles a second for a 5 gallon tank, for about 10 hrs a day. I'm not sure I like having to pay $30 a month(one cartridge every 10 days) just for CO2 injection. I'm on the hunt now for a refillable CO2 kit that I can refill at home to save money.
Reviewed in the United States on July 23, 2026 by Sei Nakaue

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