Keeping an aquarium is both an art and a science. Designing an aquascape and making sure it has all the elements it needs to stay alive and thriving is no easy task. One of the things owners have to look out for is to keep the right amount of gas levels like the carbon dioxide in their tanks. CO2 or carbon dioxide is essential to a tank, it keeps plants happy and produces oxygen that's beneficial to your fish.

One way to know if your aquarium has the right levels of CO2 is to test them with the Rhinox Glass Drop Checker. Made from high-quality glass that's easy to see even in a busy tank, this comprehensive drop checker kit has everything you need to test for a better level of CO2.

Inside of each kit, you will find
Glass drop checker
Suction cup
10ml CO2 indicator solution
Color chart

How to Use
Make sure your test kit is clean. Simply add 3 drops of CO2 indicator into the glass checker. Tilt the checker so that the indicator fluid runs into the ball about halfway. This creates the optimal surface area for reading your tank's CO2.
Next, turn the checker like the hand of a clock so that the opening faces down and the fluid remains in the ball.
Attach the checker to your tank where you can easily see it and it is completely submerged in the tank.
It will take approximately 2 hours for the first reading because the gases need to fill the checker. After the initial reading, you can leave the checker in place to monitor CO2 levels at regular intervals.