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Kore 7th Manual / kHLab Edition
15. Carbonate Solution Preparation
In order for the device to be able to maintain water alkalinity at a given level, prepare the
alkalinity supplement based on the following formula by using KH buffer (i.e. Aquaforest):
1) Prepare a 1500ml capacity (or larger) container.
2) Dissolve 80g of KH Buffer in 1000ml of RO/DI water.
The final 100ml of KH buffer solution will increase alkalinity by 2.6dKH in 100 liters
(26 Gall US) of aquarium water and the KH buffer solution based on this recipe will ensure
proper device operation (keeping the defined KH value in case of the alkalinity dropping
below the pre-set “
Minimum KH
” limit value).
The following tables show recipes with supplements from other manufacturers which
will work correctly with the Kore 7th/kHLab device.
16. Parallel Calibration
In addition to the kHLab test and calibration processes, it is recommended that the
kHLab alkalinity test results be checked periodically via a second calibration using a basic
alkalinity titration test kit. This second calibration serves to validate that the kHLab is
working correctly, given that it’s results show alkalinity around the same range.
Recipe based on NaHCO₃/Na₂CO₃
RO/DI water
NaHCO₃
Na₂CO₃
1000ml
66g
10g
Recipe based on Na₂CO₃
RO/DI water
Na₂CO₃
1000ml
52g
