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If one of your measurements reaches the end of the colour chart scale you can multiply the scale by diluting later tests with distilled water (e.g. JBL Dest). _x000D_ _x000D_ Here’s how to do it: dilute the sample with distilled water and carry out the test once more. _x000D_ _x000D_ This works in detail as follows: _x000D_ GH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH. _x000D_ KH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH. _x000D_ _x000D_ Note: when using 10 ml sample water the colour development is weaker with the first drops than with 5 ml sample water. Put the measuring container on a white underlay for a better readability. _x000D_ _x000D_ NH4/NH3 ammonium/ammonia, NO2 nitrite, Fe iron and Cu copper: _x000D_ 2.5 ml sample + 2.5 ml dist. water: result times 2 _x000D_ 1 ml sample + 4 ml dist. water: result times 5 _x000D_ 0.5 ml sample + 4.5 ml dist. water: result times 10 _x000D_ _x000D_ NO3 nitrate, SiO2 silicate, PO4 phosphate sensitive and Mg magnesium freshwater: _x000D_ 5 ml sample + 5 ml dist. water: result x 2 _x000D_ 2 ml sample + 8 ml dist. water: result x 5 _x000D_ 1 ml sample + 9 ml dist. water: result x 10 _x000D_ _x000D_ PO4 phosphate koi high range: _x000D_ 2.5 ml sample + 2.5 ml dist. water: result x 2 _x000D_ 1 ml sample + 4 ml dist. water: result x 5 _x000D_ _x000D_ K potassium: _x000D_ 7.5 ml sample + 7.5 ml dist. water: result x 2 _x000D_ 3 ml sample + 12 ml dist. water: result x 5 _x000D_ 1.5 ml sample + 13.5 ml dist. water: result x 10 _x000D_ _x000D_ K potassium in marine water: _x000D_ 1. Fill 10 ml of sample water with distilled water to 300 ml. _x000D_ 2. Follow the instructions for fresh water. _x000D_ 3. Multiply the test result by a factor of 30._x000D_ _x000D_ CO2 direct, Ca calcium and Mg+Ca magnesium+calcium: not required._x000D_
Have you lost your record sheets, used them all up, or need them in another language? _x000D_ In the appendix of this FAQ you will find PDF files for printing them out in German, English and French.
The tests from the test range: JBL GH test, JBL KH test, JBL calcium test Ca and JBL magnesium test Mg, where the number of drops are counted until the colour changes and the counted value is multiplied by a value: _x000D_ _x000D_ GH = number of drops = general hardness in °dH _x000D_ _x000D_ KH = number of drops = carbonate hardness in °dH _x000D_ _x000D_ CO2 = number of drops * 2 = CO2 in mg/l _x000D_ _x000D_ Magnesium + calcium = number of drops * 120 = amount Ca + Mg in mg/l _x000D_ _x000D_ Calcium = number of drops * 20 = amount Ca in mg/l _x000D_ _x000D_ Magnesium = amount Ca+Mg from magnesium test - amount Ca in mg/l = magnesium in mg/l
The colour cards are not available for download on the JBL website. The absolutely accurate colour reproduction that is required can only be achieved using a printer which can be re-calibrated before each printout. Most privately used printers are not accurate enough for this. _x000D_ _x000D_ You will find the colour chart bundle as a spare part on the respective product page and in the spare parts shop under: https://www.jbl.de/en/products/detail/8732/jbl-proaquatest-assortiment-color-chart
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