The JBL CO₂ Test turns light green after a few days, as if there is too much CO₂ in the water. When the test diffuser is refilled, the liquid turns dark green again.
Bacterial degradation by a biofilm on the vessel walls appears to be taking place here.
Please clean the vessel thoroughly with warm water or JBL BioClean A.
The reagent in the JBL CO₂/pH Permanent Test decolourises after a few days.
It is very likely that a bacterial biofilm has formed in the container. Please place the reaction vessel in hot water (> 40 °C) for approx. 10 minutes. In order to do so, it must be taken apart and then put together again afterwards. Please do not use boiling water, as this may cause damage to the plastic.
Are the suction cups for the JBL CO₂/pH-Permanent Test available as spare parts ?
The suction cups are available as spare parts under Art. No. 6060800 - JBL suction pads 6mm f.ProCristal 50/100 (3pcs). They are also suitable for the CO₂/pH-Permanent Test.
Aren’t these two statements about the JBL CO2/pH-Permanent test contradictory ?
The special indicator shows the CO2 level independently from substances in the water, such as humic acids or nitrate, which influence the pH value.
The pH permanent test only works when no substances, such as pH-Minus or peat, which influence the pH values, are added.
No, the two statements do not contradict each other.
The indicator reacts to the pH value of the test liquid. The indicator in the JBL CO2/pH-Permanent test only changes colour because of the carbon dioxide which has diffused from the water into the test liquid.
Humic acids or other acids have a pH-reducing effect. As a result the real pH value in the aquarium water can be lower than that shown in the indicator, which is only influenced by the diffused carbon dioxide inside the water.
Is the drop count of 35 correct for JBL Test-Set CO₂/pH-Permanent ?
Yes, the drop count is correct. This is the reason why two bottles of indicator solution are included with the test. With the new JBL Test-Set CO₂/pH-Permanent the indicator solution is no longer prepared in the aquarium water. The indicator is adjusted to a fixed carbonate hardness so that incorrect measurements (as when humic acids enter the aquarium water) no longer occur.