JBL TestLab Handbuch Seite 43

5. Move the comparator block with the two test jars backwards and forwards on the colour chart with the notch
pointing to the values, until the colour of the sample treated with reagent matches the colour under the blank
sample as closely as possible.
6. Read the silicate content in the notch of the comparator block. The additional graduation of colours from
green to red on the colour chart allows a quick reading of the measurement.
In the event that the colour of your test sample is darker than the colours of the chart, dilute the sample with
distilled or silicate-free water and measure again.
Depending on the dilution, the result must be multiplied as follows to determine the actual silicate content:
5 ml sample + 5ml dist. water: result x 2
2 ml sample + 8 ml dist. water: result x 5
1 ml sample + 9 ml dist. water: result x 10
The instructions are repeated in a series of simple diagrams on the reverse of the colour chart.
Our tip for environmentally-friendly aquarium keepers:
All reagents for JBL test sets are available from your retailer as reasonably-priced refill packs!
Warning and safety notices concerning reagent 1 + 2:
Attention
H315 Causes skin irritation. H319 Causes serious eye irritation.
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. P302+P352 IF ON
SKIN: Wash with plenty of soap and water. P332+P313 If skin irritation occurs: Get medical
advice/attention. P337+P313 If eye irritation persists: Get medical advice/attention.
Phosphate Test PO
Special features:
The JBL phosphate test set PO
within the range of 0.05-1.8 mg/l (ppm) in saltwater and freshwater as well as in garden ponds. Using the
compensation method specially developed by JBL, precise and reliable results can be obtained even in
moderately discoloured water e.g. as a result of peat filters and disease treatment. Through the high sensitivity
of this test the impending danger of excessive phosphate levels can be recognised at a very early stage and
suitable preventative measures can be taken in good time.
Why test?
Phosphate, an important plant nutrient, only occurs in very low concentrations in natural waters. The average
levels are about 0.01 mg/l in freshwater and about 0.07 mg/l in saltwater. Plants and algae have adapted to this
scarce supply of phosphate, so that they can survive with minimum amounts.
In an aquarium, phosphate primarily enters the water as a result of the digestive processes of the fish or in the
form of food remains. If conditions are unfavourable (particularly in heavily-stocked aquariums), the phosphate
levels may reach values that are sometimes 100 times higher, and more, than natural levels. Undesirable
algae will then multiply explosively as an inevitable consequence. By regularly measuring the phosphate
concentration using the JBL phosphate test set PO
the appropriate measures. It is important to know that algae can store considerable quantities of phosphate,
enabling them to continue to grow even after the level of phosphate in the water has been reduced. Therefore
the sooner the danger of a rise in the phosphate content is identified, the better the chances of quickly averting
an imminent plague of algae. In a freshwater aquarium, levels of up to 0.4 mg/l are acceptable. Better are levels
under 0.1 mg/l.
In heavily planted aquariums without fish or with only a few small fish the opposite may occur: Phosphate
becomes a deficiency and needs dosed additions for the plants to thrive and grow. This is especially the case
with so-called aquascaping, a specialized trend to create underwater landscapes in the aquatic field.
In a marine aquarium, the phosphate level need to be as close as possible to the natural level.
sensitive
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sensitive is for the measurement and routine control of the phosphate content
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sensitive, this threat can be recognised and prevented with
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