Dymax Crystal CO2 Drop Indicator
The Dymax Crystal CO2 Drop Indicator is built from high-quality glass and easily monitors CO2 levels in planted aquariums. The solution changes colors to indicate whether an excessive, optimal, or insufficient amount of CO2 is injected into the planted aquarium (when used with the pH reagent solution, sold separately).
Highlights
- A simple method for monitoring CO2 levels in a planted tank
- Ensure CO2 levels are stable
- pH reagent solution, sold separately
| Feature | Detail |
|---|---|
| Material | High-quality glass |
| Usage | CO2 level monitoring in planted aquariums |
| Color Change Indication | Excessive, optimal, or insufficient CO2 levels |
FAQ
How does the CO2 drop indicator work?
The indicator changes color based on the CO2 level in the aquarium. Different colors represent excessive, optimal, or insufficient CO2 levels when used with the pH reagent solution.
Is the pH reagent solution included with the indicator?
No, the pH reagent solution is sold separately and must be purchased separately to use with the indicator.
Can this indicator be used with all types of aquariums?
This indicator is specifically designed for planted aquariums and is not suitable for fish-only tanks or other aquarium types.

Paul Duncan –
Easy to use and very reliable. I can see the color changes clearly and it helps me maintain stable CO2 levels in my planted tank. Works well with the pH reagent solution I bought separately.
Amy Lawrence –
The glass is sturdy and the color change is noticeable. It’s a simple way to check CO2 levels without needing complicated equipment. Slightly more expensive than other options, but worth it for accuracy.
Lucas Hudson –
I’ve used this for three months now and it’s been consistent. The color shifts clearly show whether my CO2 is too high, just right, or too low. Great for beginners and experienced aquarists alike.