JBL TestLab Handbuch Seite 45

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: sulphuric acid.
Phosphate Test PO
for koi ponds
Special features:
The JBL phosphate test kit PO4 koi high range is for the accurate measurement and routine checking of
phosphate levels within a range of 0.25-10 mg/l (ppm) in unplanted koi 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.
Why test?
Phosphate, an important plant nutrient, only occurs in very low concentrations in natural waters. The average
values are around 0.01 mg/l in unpolluted natural waters. Plants and algae have adapted to these meagre levels
and only require minimal amounts of phosphate.
In koi ponds, 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 populated koi ponds), the phosphate
levels may reach values that are sometimes 100 times higher, and more, than natural levels. This inevitably
leads to an explosion of undesirable algae. By regularly measuring the phosphate concentration using the
JBL phosphate test set PO4 koi high range, this threat can be recognised and prevented with 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 unplanted koi ponds levels should be kept below 0.5 mg/l. There is still no serious danger for the fish, even if
levels are much higher than 3 mg/l. Ideally, the phosphate level in a koi pond shouldn't be measurable with this
test, i.e. it should be below 0.25 mg/l. Most importantly, garden fertilizers from the area surrounding the pond
must be prevented from entering the water. Pollen deposited in the spring is another source of phosphate in
garden ponds that should not be underestimated.
Remedial action:
Koi pond:
• Binding with JBL PhosEx Pond Filter or JBL PhosEx Pond Direct
• Careful feeding that meets the nutritional needs of the animals
• Preventing fertilizers from the surrounding area from entering the pond
Note:
When filling your koi pond with mains water, you should also bear in mind that some waterworks add phosphates
to the mains water in order to prevent lime build-up and corrosion in the pipe system. This can already lead to
an initial contamination of approx. 2 mg/l PO
Instructions:
1. Rinse two test jars several times 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 the reagents to one of the two test jars as follows:
a) A large measuring spoon (broad end of the enclosed double-ended spoon) reagent 1, close with the lid
and shake until dissolved
b) 5 drops of reagent 2, shake and 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.
Koi high range
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in the pond.
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UK