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Two Little Fishies CDX is a carbon dioxide (CO₂) adsorption media designed to help raise and stabilize pH in saltwater reef aquariums by removing CO₂ from the air before it enters your protein skimmer.
Key Features
How to Use
This product is especially beneficial if your reef tank consistently has a low pH (around 7.7–8.0) despite having proper alkalinity, as excess indoor CO₂ is often the cause.
| Parameter | Min | Max |
|---|---|---|
| Salinity | 1.024 | 1.026 |
| Calcium | 400 | 480 |
| Alkalinity | 7 | 9 |
| Phosphates | 0.01 | 0.03 |
| Nitrates | 0 | 20PPM |
| Nitrites | Undetectable | |
| Ammonia | Undetectable |
FedEx Priority Overnight shipping costs
ORDER VALUE |
FLORIDA |
OUT OF STATE |
under $299 |
$29.99 |
$39.99 |
over $299 |
FREE* |
FREE* |
