When carbon dioxide (CO2) levels are too low in an aquarium, plants inside it will be greatly affected. Once the plants are affected, it will not be long before fish and corals that are also inside the tank get affected, too. Remember, plants give off oxygen which fish and corals
need to live, but plants can only give off oxygen if they have CO2 to use up to begin with.
The first step in making sure that your aquarium has ample CO2 supply is being able to know its CO2 levels whenever you want to. This is where indicators come in. Indicators can tell the you the CO2 levels of your tank, and from there, you can do the necessary next steps.
An example of an indicator is the Red Sea CO2 Indicator from Pet Store
. This device can monitor freshwater tanks and give off results in real time, so you'll only get the latest readings no matter when you take them. It also displays the readings in an easy-to-understand visual that has a corresponding qualitative interpretation. With just one glance, you'll be able to tell right away what the CO2 levels are in your aquarium. You will never have to deal with hard-to-read results that could lead to inaccurate readings.
The Red Sea CO2 indicator will turn blue if there's a lack of CO2 in the water. It will gradually turn to green as the amount of CO2 increases.
Real time CO2 monitor for freshwater aquariums
The Red Sea CO2 indicator gives an easy to read, continuous, qualitative visual indication of the current CO2 level in a freshwater aquarium.