Water tests: here's how to test correctly
Water tests help you to „understand“ your aquarium, to pinpoint problems and give you the opportunity to correct the water parameters so that your fish, invertebrates and plants thrive.
Testing aquarium water - here’s how
Which test is for what and how do you test correctly? Aquarium water can be clear and yet toxic to aquarium inhabitants! What needs to be tested regularly and why? Which tests should be carried out when there are aquarium problems? We explain with specific examples which tests you really need in which situation and why.
There are various kinds of tests
Depending on the procedure we distinguish between the following types of water tests:
You can read what your results mean here:
As soon as you have carried out a test, you will receive a result (e.g. in milligrammes per litre (mg/l)). This will show you how to interpret the result and whether any further steps are required to optimise the water.
Tips for carrying out the water tests
Always hold the bottles with the indicator liquids vertically. Then the drop size is always the same.
Always discard the first drop since it is not always full sized. Keep a light pressure on the bottle after the first drop, so that no air is sucked in and all the following drops come out steadily.
Always position the cuvettes on a white background to better recognise the colours during the colour change tests.
Always thoroughly rinse the cuvettes with tap water after testing (better would be distilled water – JBL Dest ).
If your test has a comparator block, please use it!! A manual moving of the glass vials on the colour charts WITHOUT a comparator block leads to a different colour perception, because the plastic block throws a shadow onto the liquid part of the vials.
For JBL PROSCAN you need to know the following: don’t shake the water off after dipping the test strip as you would shake a fever thermometer. It’s better to tap it gently on a cloth or on absorbant paper. Make sure your mobile phone doesn’t cast a shadow when photographing the colour chart with the test strip.