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Mode of operation: The CO2 diffuses from the aquarium water into the air column within the permanent test casing and from there into the indicator liquid. As a result of the diffusing CO2 the pH value of the indicator changes and consequently also its colour, which is then compared on the colour scale. In this way the CO2 level and also the pH value can be read.
If however the pH value in the aquarium has been influenced by other factors (peat, pH-Minus), then the indicator of the JBL permanent test cannot react because these acids cannot diffuse into the indicator via the air column. The indicator always merely displays the pH value which is reached due to CO2.
The displayed CO2 level of the JBL permanent test is always correct, independent of any substances in the aquarium waters that are affecting the water.
- A special indicator instead of aquarium water permits direct measurement of the CO2 level in mg/l
- Replace the indicator only every 3-4 weeks = lasts a total of 9-12 months
- Indicates the pH value (6.4 - 7.8) in addition to the CO2 level
JBL is a German company with a long tradition and a vast product range for aquarium enthusiasts. From high-quality fish and shrimp food over external filters to aquatic plant fertilisers - JBL offers an enormous choice for every aquarium keeper.
The research and development department of JBL constantly brings new innovative products onto the market. No matter whether you are an aquascaper, fish keeper, shrimp keeper or planted tank enthusiast, JBL offers suitable tools and accessories for all of these aspects of the hobby in order to support aquarium enthusiasts with the set-up and maintenance of their tanks.