Does the pH test 3 – 10 also reliably measure in weakly buffered solutions?
Osmosis water and water with a KH below 1° dKH rank in aquatic terms among the weakly buffered solutions. In these waters such test procedures cannot provide reliable measurement results.
I have lost my colour chart. Can I download the colour chart for the test?
The colour cards are not available for download on the JBL homepage. For this a guaranteed true colour print is required, and you need a printer which can be re-calibrated before each printout. Most privately used printers are not accurate enough for this.
We will happily send you a new colour chart bundle with all individual colour charts for the JBL tests free of charge. Please forward the JBL customer service your address.
Which of the three scales on the colour cards symbolize of the water tests saltwater, freshwater and garden pond ?
koi carp = garden pond
angel fish = saltwater
discus = freshwater
Which scale applies for my aquarium? My test has two or three control fields with fish and recommendations.
We repeatedly receive questions regarding the symbols on the water test. The hobby areas cannot be clearly assigned to the scales for analysis. There are three symbols to make the hobby areas on the colour charts clear:
Discus = fresh water
Emperor = salt water
Koi = garden pond
In the following, you will find a list which assigns the scale for analysing the results from measurements in the hobby area and explains the symbols: The scales are described from the top to the bottom here.
NO3: salt water, fresh water, garden pond
pH 6.0 – 7.6: fresh water, garden ponds
pH 7.4 – 9.0: salt water, fresh water, garden pond
Fe: fresh water, garden pond
The following JBL tests have a uniform scale for all 2 or 3 hobby areas for analysis of the results from the measurements, as differentiation is no longer necessary:
On the bottle of the JBL pH Test 3.0-10.9, it states 3 drops, whereas it states 4 drops in the instructions.
4 drops are correct. 3 drops will also work, the pH level is indicating correctly, but the colour development is less intense.
What is the shelf life of the JBL pH Test 3-10 ?
The JBL pH test 3-10 has a shelf life of 4 years in the original sealed bottle.
The following is printed on the bottom of the packaging:
CH/B: 2559 (e.g.) = batch number
BBD: 01/15 (e.g.) = best-before date (month/year)
Please note that the best-before date does not apply for opened reagents. Exposure to atmospheric oxygen decreases the shelf life.
Do my water tests still work although they have been open for nine months?
Basically a sealed test keeps longer than an open one. How much the shelf life is reduced depends crucially on the handling and the storage conditions of the reagents. It may happen that a reagent in a test that has been open for 9 months doesn’t indicate correctly any more. However, additional information is needed to answer this question properly.
The instructions for JBL pH Test 3-10 state that 4 drops should be added. On the reagent bottle, though, 3 x drops are shown. Which information is valid?
Both, but 3 drops are enough. With 4 drops, the colour is somewhat stronger, which can make it easier to read the results.