JBL TESTLAB Bedienungsanleitung Seite 18

pH 6,0 - 7,6:
Special features:
The JBL pH Test Set 6.0-7.6 is designed for the accurate measurement and routine control of
the pH level in freshwater within the relevant range of 6.0 -7.6, and above all for the control and
the adjustment of CO 2 -fertilization with the JBL PROFLORA CO 2 -system. Using the compensa-
tion method specially developed by JBL, precise and reliable results can be obtained even in
moderately discoloured aquarium water, e.g. caused by peat filters and disease treatment.
Why test?
The well-being of aquarium fish and the growth of aquatic plants depends to a large extent on a
maintaining a correct and consistent pH level. The pH level plays a significant controlling role in
CO 2 -fertilization. The CO 2 -concentration best suited for plants and harmless to fish is reached
with a pH level around 7 to 7.2, provided that the water does not contain any other substances
which might upset the pH level. The carbonate hardness should not drop below 4° (= 70 ppm
CaCO 3 ) and not exceed 18° dH (= 320 ppm CaCO 3 ). This means that a simple pH measurement
is sufficient to check the best possible CO 2 -fertilization. Precise measurements may also be
required even if CO 2 is not used for fertilizing, for instance if problems in the breeding of special
species of fish are encountered. The pH Test Set 6.0 - 7.6 is also suitable in these cases.
Remedy in case of pH fluctuations:
To lower pH: CO 2 fertilization with the JBL PROFLORA CO 2 System or JBL Aquacid.
To raise pH: normally not required in freshwater, otherwise with JBL Aquadur plus or JBL Aquakal.
Instructions:
1. Repeatedly rinse both test jars with the aquarium water to be tested.
2. Use the enclosed syringe to fill each of the test jars with 5 ml of sample water.
3. Add 3 drops of 6.0 - 7.6 reagent to one of the test jars and mix by agitating.
4. Place both test jars into the comparator block: the jar with added reagent into the smooth
end of the comparator block, the jar with the untreated test water (blank sample) into the
notched end of the comparator block.
5. Move the comparator block together with the jars side to side over the colour chart with the
notch pointing to the levels until the colour of the sample with added reagent matches the
colour of the blank sample.
6. Read the pH level in the notch of the comparator.
See the JBL brochure "What - Why - How" No. 2 for more details on the significance of pH in
CO 2 -fertilization.
Our tip for ecologically-minded users:
All reagents for the JBL test sets are available from your retailer in convenient and reasonably
priced refill packs.
CO :
2
For aquatic plants, CO
plant growth is usually caused by a lack of CO
provides at the same time a favourable pH level of about 7. As the levels of CO
hardness (KH) are directly related, the measurements of pH value and carbonate hardness (KH)
can be used to establish the associated CO
Remedies for unfavourable values:
CO level too low: CO
2
CO level too high: Briefly agitate or aerate the water, check and adjust setting of CO
2
Determining the CO
If no substances which reduce the pH value (nitrate, peat etc.) are present in the water, the CO
level can be calculated from the pH level and the carbonate hardness (KH). First measure the
pH level and the carbonate hardness (KH). Using the enclosed table, find the line or column
is the most important nutrient in a freshwater aquarium. Unsatisfactory
2
fertilization with JBL PROFLORA CO
2
level in freshwater using the pH value and the carbonate hardness:
2
in the aquarium. An adequate supply of CO
2
level from a table.
2
system
2
UK
2
, pH and carbonate
2
fertilization
2
2