Aqua Rebell CO2 Check 20 mg/l - 250ml

Our permanent CO₂ checking solution “CO₂ Check - 20 mg per Liter” can be used in every permanent CO₂ testing device. It serves the purpose of controlling the CO₂ levels over a longer period of time. An optimal level of CO₂ is essential for the well-being of your waterplants and thus should be checked permanently. Our permanent CO₂ checking solution has the advatage of testing the CO₂ content independetly of the tank water so that no substances like e.g. humic acids can influence the test result.

	There is too much CO2 in your tank. Please lower.
	Optimal CO2 content (approx. 20 mg/l).
	There is not enough CO2 in your tank. Raise slowly.

Usage

Fill 1 to 2 ml of our CO₂ checking solution into your permanent checking device and put it into an area with good current in your tank. After 1 to 2 hours you can see how much CO₂ there is in your tank. When the liquid is green, your aquarium has an optimal CO₂ content of approximately 20 mg/l.

A permanent CO₂ check is a very useful thing in a tank. Often the plants lack essential CO₂ and do not grow at their optimum. A permanent CO₂ check gives you a sufficiently exact reading how much CO₂ you have in your water. The colourant bromothymol blue is used here as it changes its colour with certain pH values.

CO₂ diffuses into the air bubble in the permanent test from the tank water and thus into the testing solution (and vice versa). Depending on its CO₂ content, the pH value in the testing solution changes, and with it its colour. The constant carbonate hardness in the testing solution determines which CO₂ concentration causes which pH value. The testing solution “CO₂ Check 20 mg per Liter” turns a light green when its pH is around 6.6, which corresponds to a CO₂ concentration of 20 mg/l. Thus you know that your tank water has a carbon dioxide concentration of 20 mg/l when the testing solution is a light green.