Aquarium CO2 Glass Drop Checker | Planted Tank CO2 Monitor
Aquarium CO2 Glass Drop Checker | Planted Tank CO2 Monitor
Aquarium CO2 Glass Drop Checker – Keep Your Planted Tank Thriving
Maintain the ideal CO2 levels in your planted aquarium with this precision borosilicate glass drop checker. Designed for freshwater planted tanks, this elegant glass indicator lets you monitor CO2 concentration at a glance, helping you ensure your aquatic plants get exactly what they need to grow lush and healthy.
Why You Need a CO2 Drop Checker
Too little CO2 and your plants struggle; too much and your fish are stressed. A drop checker takes the guesswork out of CO2 management — simply fill it with indicator solution (sold separately), attach it to your tank wall with the included suction cups, and watch the colour tell you everything you need to know.
- Premium Borosilicate Glass – Clear, durable, and algae-resistant for long-term use
- Easy Visual Monitoring – Colour-change indicator solution gives an instant CO2 reading
- Suction Cups Included – Secure, no-fuss attachment to any smooth glass tank wall
- Elegant Design – Low-profile, stylish look that complements any planted aquascape
- Universal Fit – Compatible with all standard freshwater planted aquarium setups
- No Batteries or Power Required – Fully passive operation, zero running costs
How to Use
- Fill the glass bulb with a small amount of CO2 indicator solution (not included).
- Attach the drop checker to the inside of your aquarium glass using the suction cups.
- Monitor the colour: Blue = too little CO2 | Green = ideal level | Yellow = excess CO2.
- Adjust your CO2 injection rate accordingly for perfect plant growth.
Specifications
- Material: Borosilicate Glass
- Includes: 1× Glass Drop Checker, Suction Cups
- Power Required: None
- Country of Origin: Made in Mainland China
Package Contents
1 × Aquarium CO2 Glass Drop Checker
Suction Cups (included)
Note: CO2 indicator solution is not included and must be purchased separately.
Explore More Aquarium & Fishkeeping Accessories
Looking for more tools to keep your tank in top shape? Check out our related products:
- 2-in-1 Stainless Steel Fruit Corer & Peeler | Non-Slip Handle
- 34-Compartment Double-Sided Hardware Storage Box & Dividers
Learn more: U.S. Fish and Wildlife Service
Frequently Asked Questions
Q: Does the CO2 drop checker come with indicator solution?
A: No, the CO2 indicator solution is not included with this glass drop checker. You will need to purchase a separate CO2 indicator solution (such as a bromo blue or pH-based solution) to use with the checker. These are widely available at aquarium shops or online.
Q: What material is the drop checker made from, and is it safe for aquariums?
A: The drop checker is made from high-quality borosilicate glass, which is heat-resistant, chemically inert, and completely safe for use in freshwater planted aquariums. It will not leach any chemicals into your tank water.
Q: How does a CO2 drop checker work?
A: A CO2 drop checker works by trapping a small air bubble inside the glass chamber. CO2 from your tank water diffuses into this bubble and reacts with the indicator solution, changing its colour. Blue indicates low CO2, green indicates an ideal level, and yellow indicates excess CO2, allowing you to fine-tune your injection rate for optimal plant growth.
Q: Is the drop checker compatible with all fish tanks?
A: Yes. The glass drop checker attaches to your aquarium wall via the included suction cups and is compatible with all standard glass aquariums used in freshwater planted tank setups.