Two Little Fishies CDX – 750mL CO₂ Absorption Media

Two Little Fishies CDX is a specialized CO₂ absorption media designed for use with protein skimmer air intake systems. By reducing excess carbon dioxide in the air being drawn into the skimmer, CDX helps raise and stabilize aquarium pH naturally, creating a healthier environment for corals and reef inhabitants. The media is housed in an airtight container to preserve its effectiveness and can be used with a CO₂ reactor or air dryer canister connected to your skimmer's air intake.

The 750mL size is ideal for small to medium reef aquariums and works best when the media is replaced once it becomes exhausted or changes color.

Why You’ll Love It:

• Absorbs CO₂ from skimmer air intake to help raise pH

• Promotes healthier coral growth in low pH reef systems

• Easy to use in a reactor or air dryer canister

• Helps stabilize alkalinity and carbonate balance naturally

• 750mL container for small to medium aquarium systems