The Aqua Medic CO2 Indicator is used to determine the carbon dioxide content of the water in a simple way. Carbon dioxide is a very important nutrient for healthy plant growth. At the same time, this quite good water-soluble gas is toxic to the animal life in the aquarium in high concentrations so that a check of the available quantity is extremely important. The Aqua Medic CO2 Indicator has to be filled with 1 ml of Aqua Medic Indiactor solution and takes place in the aquarium. A blue colour indicates too little carbon dioxide, a pale green to yellowish indicates too much carbon dioxide. A dark green colour (see indicator disc) shows that the content is okay. If the colour fades in the permanent test, the unit must be refilled.
 Your question: Aqua Medic CO2 Indicator -CO2 Permanent test-
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