






🌿 Keep your tank thriving with precision CO2 monitoring—because your aquatic ecosystem deserves the best!
The Rhinox Glass Drop Checker Kit is a must-have aquarium tool featuring a high-quality glass drop checker and pre-mixed 4dKH & pH reagent. It offers a quick 3-minute setup and delivers CO2 level readings in just 3 seconds via an easy-to-read color change system. Designed for continuous 24/7 monitoring, it ensures accurate and reliable CO2 balance, outperforming traditional test strips, making it essential for maintaining healthy planted tanks and aquariums.










| ASIN | B0895Z9399 |
| ASIN | B0895Z9399 |
| Best Sellers Rank | #35,055 in Pet Supplies ( See Top 100 in Pet Supplies ) #122 in Aquarium Air Pump Accessories |
| Brand Name | Rhinox |
| Customer Reviews | 4.4 4.4 out of 5 stars (81) |
| Date First Available | October 16, 2020 |
| Date First Available | October 16, 2020 |
| Directions | 1. Ensure the test kit is clean. 2. Add 3 drops of CO2 indicator into the glass checker. 3. Tilt the checker so that the indicator fluid runs into the ball about halfway. 4. Turn the checker so that the opening faces downward and the fluid remains in the ball. 5. Attach the checker to the tank where it can be easily seen and is completely submerged. 6. Wait for approximately 2 hours for the first … |
| Item Package Dimensions L x W x H | 4.84 x 3.5 x 1.34 inches |
| Item Weight | 0.05 Kilograms |
| Manufacturer | Rhinox |
| Manufacturer | Rhinox |
| Package Dimensions | 4.84 x 3.5 x 1.34 inches; 1.76 ounces |
R**.
Works well
Easy to use and the quality of the glass is good. It’s looks huge on my 2.5gal. So far it’s working well and the price isn’t bad either!
R**Y
PH checker
Great, writing in English and Chinese.
Q**K
Works As Advertised
Works as described, included flexible syringe thingy makes it easy to get indicator solution into bulb. Have removed & reattached several times now & suction cup still attaches firmly to glass.
D**S
Drop checker
Made of crystal, good quality. Works well monitoring CO2 levels.
S**N
It’s cheap but it works great
I did a pH test before co2 kicked in and after about five hours running. The regen is pretty accurate and it works like any other more expensive kit I’ve owned has. I definitely recommend this product.
K**Y
Would recommend
I like it. It worked as indicated. I saw some complaints about the instructions not being in English, , but its kind of self explanatory
A**R
It is always blue
This doesn't seem to work. It is blue all the time. I tried Co2 injection and my ph is 6.5 but it says blue no matter what I do. at this point I be leave that it is a scam. Why does the scale show PH not CO2
J**.
No instructions at all.
No instructions. Add on here says 3 drops bottle says 15. No indication on aquarium placement.
H**N
Arrived as promised but there are no instructions in English. I read the instructions on the Internet but they seem to contradict the instructions on the reagent bottle. The instructions on Amazon suggest only thee drops, but that is way less than the image shows. The bottle suggest 15 drops which seems more appropriate in terms of volume shown - probably works, but confusing to figure out. As a lab person I know the importance of detailed and accurate instructions for using reagents and this hasn't got it.
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