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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). Here’s how to do it: dilute the sample with distilled water and carry out the test once more. This works in detail as follows: GH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH. KH test: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH. 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. NH4/NH3 ammonium/ammonia, NO2 nitrite, Fe iron and Cu copper: 2.5 ml sample + 2.5 ml dist. water: result times 2 1 ml sample + 4 ml dist. water: result times 5 0.5 ml sample + 4.5 ml dist. water: result times 10 NO3 nitrate, SiO2 silicate, PO4 phosphate sensitive and Mg magnesium freshwater: 5 ml sample + 5 ml dist. water: result x 2 2 ml sample + 8 ml dist. water: result x 5 1 ml sample + 9 ml dist. water: result x 10 PO4 phosphate koi high range: 2.5 ml sample + 2.5 ml dist. water: result x 2 1 ml sample + 4 ml dist. water: result x 5 K potassium: 7.5 ml sample + 7.5 ml dist. water: result x 2 3 ml sample + 12 ml dist. water: result x 5 1.5 ml sample + 13.5 ml dist. water: result x 10 K potassium in marine water: 1. Fill 10 ml of sample water with distilled water to 300 ml. 2. Follow the instructions for fresh water. 3. Multiply the test result by a factor of 30. CO2 direct, Ca calcium and Mg+Ca magnesium+calcium: not required.
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. Therefore, if the comparator block is not used, there will most likely be deviations in the readings.
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.
To answer this question some further information is required in order to detect any errors that may have occurred. 1) Are the reagents of the copper test still all right? (best-before date has not expired and it has not be opened longer than about 6 – 9 months.) 2) Has the medication expired? (The best-before date can be found on the bottom of the folding box or the bottle.) If the answer to the first question is yes and the answer to the second question is no, then please do the following: 1) Fill a 10 l bucket with tap water. 2) Carry out a copper test. The value should be 0 mg/l. 3) Dose JBL Oodinol 1000, following the instructions. 4) Stir the water thoroughly. 5) Carry out a copper test again. The value should be 0.3 mg/l. 6) If the test changes its colour it means both products are all right and the copper will then precipitate in the aquarium. Copper as a metal is exposed to various processes. These include, for instance: The precipitation of barely soluble copper salts. The copper mostly accumulates in the filter media. A good remedy for this is to replace the filter media and then repeat the dosage. Accumulation in the sediments. A good remedy for this is to carry out a substantial water change and suction off the sediment (use a gravel cleaner). Afterwards repeat the treatment according to the instructions. Consumption by organisms, especially aquatic plants (copper is an essential trace element for aquatic plants), is not usually an issue with the usual medical dosage.
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. 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.
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. Above the different coloured measuring points are numbers, three symbols and a colour band for each. The symbols stand for the following applications: Fish = freshwater Koi = garden pond Starfish = marine water 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. The first two (freshwater and pond) colour bands belong to the upper number row. Marine water belongs to the lower number row. Why do the values differ? 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 Why do the recommendations differ? 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.
Have you lost your record sheets, used them all up, or need them in another language? In the appendix of this FAQ you will find PDF files for printing them out in German, English and French.
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