JBL TestLab Handbuch Seite 31

Warning and safety notices:
Danger
H225 Highly flammable liquid and vapour. H314 Causes severe skin burns and eye
damage.
P101 If medical advice is needed, have product container or label at hand. P102 Keep out
of reach of children. P210 Keep away from heat, hot surfaces, sparks, open flames and
other ignition sources. No smoking. P303 + P361 + P353 IF ON SKIN (or hair): Take off
immediately all contaminated clothing. Rinse skin with water [or shower].P305 + P351
+ P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact
lenses, if present and easy to do. Continue rinsing. P405 Store locked up.
GH Test Set
Features
The JBL TH test set is an easy to use quick-test for determining the total freshwater hardness.
Why test?
Depending on origin and consistency of the subsoil, water may contain varying quantities of alkaline earth salts,
usually in the form of calcium and magnesium salts.
Total hardness, by definition, is the sum of calcium and magnesium ions suspended in the water. Most fish and
plants thrive well at a total hardness of between roughly 8 and 20°d. Excessive total hardness values, should,
however, be combated by taking appropriate measures. In garden ponds, the total hardness readings are often
low due to dilution from precipitation.
What to do in the event of
excessive total water hardness in an aquarium:
There are various methods for reducing water hardness (e.g. by using a reverse osmosis system such as JBL
Osmose 120). Ask your pet shop specialist for details.
In case of too low total water hardness in the aquarium:
Use JBL AquaDur Plus.
In case the general water hardness is too low in your garden pond:
Use JBL StabiloPond Basis.
Instructions
1. Repeatedly rinse the measuring vessel with the water to be tested.
2. Fill the measuring vessel with the water to be tested up to the 5 ml mark
(CAUTION: the lower line of the water level must coincide with the marking).
3. Add reagent one drop at a time, counting the drops, and shake after each drop until the colour changes from
red to green.
4. One drop of reagent solution used corresponds to 1° total hardness (German scale).
For more precise readings:
Fill the measuring vessel up to the 10 ml mark with the water to be tested.
One drop of reagent solution used up corresponds to 0.5° total hardness (German scale).
Note: With 10 ml sample water the colour development is less intensive for the first drops. For better readability
place the measuring vessel on a white surface.
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