JBL TestLab Handbuch Seite 46

5. Move the comparator block together with the jars backwards and forwards on the colour chart, with the
notched side of the block facing the scale, until the colour of the sample treated with reagent matches the
colour under the blank sample as closely as possible.
6. Read the phosphate content in the notch of the comparator block. The graduation of colours from green to
red provided on the colour chart enables you to read the measured value easily.
In the event that the colour of your test sample is darker than the colours of the chart, dilute the sample with
distilled or phosphate-free water and measure again.
Depending on the dilution, the result must be multiplied as follows to determine the actual phosphate content:
2.5 ml sample + 2.5ml dist. water: result x 2
1 ml sample + 4 ml dist. water: result x 5
The instructions are repeated in a series of simple diagrams on the reverse of the colour chart.
Warning and safety notices concerning reagent 2:
Danger
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. P280 Wear protective gloves/protective clothing/eye protection/
face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several
minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310
Immediately call a POISON CENTER or doctor/physician.
Hazard-determining component of labelling (reagent 2): sulphuric acid.
Iron Test Set Fe
Special features:
The JBL iron test set Fe is for the measurement and routine control of the iron content in freshwater and marine
aquariums as well as in garden ponds within the range 0.05-1.5 mg/litre (ppm). Using the compensation method
specially developed by JBL, precise and reliable results can be obtained even in moderately discoloured water,
e.g. caused by peat filters and disease treatment.
Why test?
Besides an adequate supply of CO
plants constantly consume iron and other trace elements, which only keep in the water for a limited period
even when bonded to so-called chelating agents (usually found in modern fertilizers, e.g. in JBL Ferropol, JBL
ProScape Fe +Microelements), the iron content must be monitored regularly with the JBL iron test set Fe and
replenished if necessary. A concentration of 0.1-0.2 mg/litre (ppm) is normally adequate for good plant growth,
for very plant intensive aquariums values up to 0.5 mg/l (ppm) can be useful. The JBL iron test set Fe can also
be used to measure the iron content in tap water (normally iron-free) or in natural waters as well as in garden
ponds. Levels between 0.002 and 0.05 mg/l are recommended in marine aquariums.
Remedy:
Iron content too low: fertilize with JBL Ferropol and Ferropol 24, JBL ProScape Fe +Microelements.
Iron content too high: change part of the water or filter with JBL Carbomec activ.
Instructions:
1. Repeatedly rinse both test jars with the water to be tested.
2. Use the enclosed syringe to fill each of the test jars with 5 ml of sample water.
3. Add 5 drops of Fe reagent to one of the test jars and mix by shaking. Allow to settle for 5 minutes.
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 backwards and forwards on the colour chart, with the
notched side of the block facing the scale, until the colour of the sample treated with reagent matches the
colour under the blank sample as closely as possible.
6. Read the iron content in the notch of the comparator.
, aquatic vegetation needs iron and trace elements. Since healthy aquatic
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