The Spark of an Aquascape: CO2

Pressurized CO2 is one of the most effective upgrades for a planted aquarium, supporting healthier plant growth, richer color, and a wider variety of aquatic plants. Whether you’re assembling your first system, upgrading an existing one, or looking to retrofit it with CO2 accessories, this collection helps you find the right components with confidence.

Find the Right CO2 System

Not sure where to begin? Find the path that best matches your goals.

• I’m New to CO2 CO2 Kits
  The easiest way to get started with compatible components already selected for you.
• I Need a CO2 Cylinder CO2 Cylinders
  Find the right cylinder for your aquarium, available space, and refill schedule.
• I Need a CO2 Regulator CO2 Regulators
  Choose the regulator that’s right for your aquarium and future expansion plans.
• I Need a CO2 Diffuser CO2 Diffusers
  Compare traditional in-tank and more discreet inline options.
• I’m Upgrading or Replacing Parts CO2 Accessories
  Monitor, automate, connect, and maintain your system.

CO2 Works Best as Part of a Complete Pie

CO2 doesn’t exist in isolation. If you’re already injecting or investing in a CO2 system, it’s also worth considering these important, complementary categories.

• Aquarium Lighting
• Aquatic Plant Fertilizers

Want to learn more about pressurized CO2? Open any CO2 product and scroll down to explore our Ultimate Planted Aquarium CO2 Guide, where you’ll find in-depth information on setup, maintenance, and getting the most from your system.