You have no items in your shopping cart.
CALL US NOW
(305) 227-9414
(305) 227-9414
$26.99
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...
Availability:
5 In Stock
Strictly Fish Miami
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
- Removes CO₂ from the air supplied to your protein skimmer.
- Helps increase and stabilize aquarium pH naturally.
- Ideal for reef tanks in homes with elevated indoor CO₂.
- Works in a PhosBan Reactor or similar media reactor connected to a protein skimmer.
- Color-changing media indicates when replacement is needed (white to pink/violet, depending on the batch).
How to Use
- Fill a media reactor with CDX.
- Connect the reactor outlet to your protein skimmer’s air intake using the appropriate tubing and adapter.
- Replace the media when it changes color, typically every 6–8 weeks on a 50–100 gallon reef aquarium, depending on indoor CO₂ levels.
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* |
FREE IN STORE PICK UP AVAILABLE! contact us for details
We currently don't ship to Alaska, Hawaii, Puerto Rico or outside the continental US
*Excluding taxes
HOW WE SHIP
- - All orders are shipped via FedEx Priority Overnight
- - Double bagged in 3 mil bags
- - Each box is prepared with a bag liner to prevent leaking
- - All destination temperatures are checked prior to shipping to determine whether or not a heat pack or ice pack* is required
- *Ice packs may melt prior to delivery. This will not cause any damage to your livestock order.
FREE SHIPPING
On Orders Over $299
HAND PICKED QUALITY
100% Aquaculture
FOLLOW US
@STRICTLYFISHMIAMI
Bestseller Products
Also Purchased
Dry Goods
All-For-Reef
Tropic Marin All-For-Reef is an all-in-one liquid reef supplement designed to maintain calcium, alkalinity, magnesium, and essential trace elements in marine aquariums. Its balanced formula provides everything corals and other...
$21.99
Dry Goods
Kalkwasser Julian Sprung
Two Little Fishies Kalkwasser by Julian Sprung is a high-purity calcium hydroxide (Ca(OH)₂) powder used to maintain calcium and alkalinity in marine reef aquariums. When mixed with purified freshwater, it...
$21.99
Dry Goods
NPX BioPellets Julian Sprung 200L ( 50 Gal )
Two Little Fishies NPX Bioplastics (Julian Sprung) are biodegradable polymer pellets designed to naturally reduce nitrate (NO₃) and phosphate (PO₄) in marine aquariums. The pellets provide a continuous carbon source...
$19.99
Dry Goods
NeoPhos BrightWell Aquatics
Brightwell Aquatics NeoPhos is a concentrated phosphate supplement used to increase phosphate (PO₄) levels in marine and freshwater aquariums. It’s commonly used in reef tanks where phosphate has become too...
$11.99
Dry Goods
Phosphate-E Brightwell Aquatics
Brightwell Aquatics Phosphate-E is a highly effective liquid phosphate remover designed to quickly reduce elevated phosphate levels in both freshwater and marine aquariums. Its lanthanum-based formula binds dissolved phosphate into...
$26.99
Dry Goods
Koral Color BrightWell
Brightwell Aquatics KoralColor is a concentrated trace element supplement formulated to enhance the natural coloration of corals, clams, and other reef invertebrates by supporting the production of biological pigments (biochromes)....
$23.99