JBL TestLab Handbuch Seite 44

In the garden pond levels need to be kept below 0.05 mg/l. From limnology (freshwater science) it is known that
considerable algae growth does not occur with permanent (year-round) phosphate contents under 0.035 mg/l.
Ideally, the phosphate level of the pond should not be measurable with this test, i.e. it should be below 0.05 mg/l.
It is important that garden fertilizer does not seep into the pond from the soil around the pond.
Remedies:
Levels too high:
Aquarium:
• Filtering with JBL PhosEx ultra, absorbing with JBL PhosEx rapid
• Regular partial changes of water (in freshwater 20-30 % every 2 weeks, in saltwater 10 % every 4 weeks)
• Moderate feeding
• Avoidance of care products containing phosphates. An aquarium is not the place for fertilizers for house or
garden plants! JBL care products do not contain either phosphate or nitrate.
Garden pond:
• Absorbing with JBL PhosEx Pond Filter or JBL PhosEx Pond Direct
• Moderate feeding
• Avoidance of fertilizers seeping into pond from surrounding soil
Values too low:
Aquarium (aquascaping):
Dosed addition of JBL ProScape NPK Makroelements or JBL ProScape P Macroelements.
Note:
Check the phosphate level in your mains water. Many household water supplies have a phosphate dosage unit
installed to prevent corrosion of the piping. If this is the case, try to take the water for your aquarium from a point
before this unit, (asking the house owner for permission)
Instructions:
1. Repeatedly rinse both test jars with the water to be tested.
2. Use the enclosed syringe to fill each of the test containers with 10 ml of sample water.
3. Add the reagent to one of the two test jars as follows:
a) A small measuring spoon of reagent 1 (narrow end of enclosed double spoon), close lid and shake until
dissolved
b) 10 drops of reagent 2, shake, leave to stand for 10 minutes.
4. Place both test jars in the comparator block: the jar with the added reagent at the smooth end of the
comparator block, the container with untreated sample water (blank sample) at the notched end of the
comparator block.
5. Move the comparator block with the two test 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 additionally on the colour chart enables you to read the values 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:
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 the environmentally-friendly user:
All reagents for JBL test sets are available from your retailer as reasonably-priced refill packs!
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