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The reason is often an incorrect use of the test. It is important to shake the test vigorously for precisely one minute. All the other important steps can be read in the instructions.
The JBL PROAQUATEST Cu Copper measures copper which is free in the water. If the copper is bound (chelated) because it has been rendered harmless by a water conditioner (e.g. JBL Biotopol), it cannot be detected by the test. _x000D_ These complexes are so stable that they cannot be broken up in the aquarium. There is no longer any danger for aquarium inhabitants. Therefore, the test can no longer detect the copper. The compounds are removed during the water change by sucking off mulm or during filter cleaning.
The colour charts are intended to be used with the comparator block. In addition, when the comparator block is used with the blank water sample, this compensates the inherent water colour._x000D_ _x000D_ Therefore, if the comparator block is not used, there will most likely be deviations in the readings.
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.
With the JBL PROAQUATEST drop tests you have a laboratory comparator system which compensates the inherent colouration of the water and at the same time enables non-chemists to carry out an accurate and safe water analysis. To ensure that water testing monitors the life of your fish and provides the greatest possible safety, you will find an evaluation adaptable to three different applications. _x000D_ _x000D_ Above the different coloured measuring points are numbers, three symbols and a colour band for each. _x000D_ _x000D_ The symbols stand for the following applications: _x000D_ Fish = freshwater _x000D_ Koi = garden pond _x000D_ Starfish = marine water _x000D_ _x000D_ The colour band tells you the meaning of the value determined in green (everything OK), yellow (attention) and red (need for action). In addition you will find numbers that reflect the value in mg/l for the respective colour field. _x000D_ _x000D_ The first two (freshwater and pond) colour bands belong to the upper number row. Marine water belongs to the lower number row. _x000D_ _x000D_ Why do the values differ? _x000D_ Due to the high salt concentration in marine water, the colouring of the reaction is not as intense as in freshwater (which also includes pond). Consequently, the value for the same colouration is greater than in freshwater _x000D_ _x000D_ Why do the recommendations differ? _x000D_ Every habitat reacts differently to certain nutrient concentrations. In the garden pond, for example, constantly changing temperatures and light intensity can jeopardise the value more than in freshwater, where, unlike in the pond, these factors are constant and necessary additives are supplied. That’s why the recommendations are green for one area of application, yet yellow for the other._x000D_ _x000D_
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