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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 lter with JBL Carbomec activ.
Instructions:
1. Repeatedly rinse both test jars with the water to be tested.
2. Use the enclosed syringe to ll 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.
Note:
If you decide to use the JBL ammonium test set at the same time, make sure not to mix up the measuring
vessels of both sets. Traces of the ammonium test left inside the measuring vessel may lead to incorrect high
readings in the iron test.
The instructions are repeated in a series of simple diagrams on the reverse of the colour chart.
Our tip for the environmentally-friendly users:
All reagents for JBL test sets are available from your retailer as reasonably-priced rell packs!
Warning and safety notices
Attention
H302 Harmful if swallowed. H315 Causes skin irritation. H319 Causes serious eye
irritation. H335 May cause respiratory irritation.
P101 If medical advice is needed, have product container or label at hand. P102 Keep out
of reach of children. P261 Avoid breathing vapours/spray. 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. P405 Store locked up.
K Potassium Test Set
Special features:
The JBL K Potassium Test Set is designed for measuring and doing routine checks of potassium content in
freshwater aquariums within a range of 2 - 15 mg/l (ppm). Salt water has a potassium concentration of around
390 - 400 mg/l, which, however, is only consumed in small amounts. Excessively high potassium concentrations
can endanger sensitive animals such as shrimp.
Why test?
Potassium is one of the macroelements which is absorbed very quickly and effectively within a few hours
and stored temporarily by plants in fresh water. Growing plants require more potassium compared to other
elements. As a result, potassium concentrations can drop to a minimum range, causing plant growth to stagnate,
even if the aquarium water is fertilised regularly (e.g. weekly). Potassium levels in mains water are usually
too low compared to natural biotopes, particularly with regard to calcium and magnesium concentrations. We
recommend daily measurement of the potassium concentrations of your tank water initially. This enables you
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