EHEIM 3531 User manual

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





A / B






C
1 cm
D
E
+
–
–
+
+
–
–
+
>ø 2 mm

Installation
Inserting the batteries (4 x 1.5 V mignons)
BSet the impeller on the impeller holder, and fit the suction jet and the housing
together.
CRemove battery compartment cover by applying pressure on the unlocking
button. Insert the batteries in accordance with the pole markings +/–.
Please make sure the batteries are fitted correctly. If not, the impeller will
run in the reverse direction with very limited power.
Make sure that no moisture gets into the battery compartment and ensure
that the sealing ring fits properly when you close it. The unlocking button
then has to noticeably click into place.
The alkaline batteries which are supplied with the automatic gravel cleaner
English
Function
Safety instructions
ABattery compartment cover with button Battery holder Unlocking
button Housing Impeller Impeller holder Filter element Lo-
cating device Cover (top and bottom) Suction jet Extension jet.
The automatic gravel cleaner can be used in fresh water and marine water
aquariums with a water depth of approx. 60 cm.
Aquarium gravel not coarser than ø 2 mm. Not suitable for cleaning sandy
bottoms.
If the batteries are not being used for a long time remove them! EHEIM
does not provide any warranty for damages which are caused by leaky bat-
teries or storage batteries!
Do not throw exhausted batteries in the household refuse. Hand over the
old batteries to your dealer or public collecting points when buying new
ones.
Do not clean the unit – or parts of it – in the dishwater. Not dishwater re-
sistant!
Do not dispose of this product as normal household waste. Take it to your
local refuse collection site.

EPress the two locating buttons on the sides and pull out the filter element.
The cleaner itself can remain in the aquarium. Take one or both covers off the
filter element and thoroughly clean out the dirt which has collected there by
holding it under running water. After cleaning the filter replace the cover. Now
put the bottom of the filter element into the cleaner first and then snap home.
After using in marine water thoroughly rinse out the cleaner with tap water.
To clean the unit remove the suction jets and filter elements, pull off the
impeller wheel and rinse it thoroughly under running water. Keep the battery
compartment closed!
Make sure that the automatic gravel cleaner is only operated under water so
that the impeller does not run dry. When stirring up small dirt particles the
aquarium water can become slightly cloudy. However, this is quickly re-
moved by the aquarium filter.
Cleaning the filter element
DAfter the suction jet – and, if required, also the extension jet – have been con-
nected to the pump chamber the cleaner is ready for use. For cleaning the
bottom the suction jet is used for loosening the gravel layer to a depth of
approx. 1 cm, whereby the sludge is churned up and drawn into the suction
stream of the pump. In this way the useful bacteria remain undisturbed in the
lower part of the gravel bed.
The waterproof button can be used to conveniently switch the cleaner on and
off. When switched off any gravel which has been sucked up falls back to the
bottom. Continue to clean an area until the water in the suction jet is clear.
Cleaning the bottom
last for an operating life of approx. 4 hours and if nickel-cadmium storage
batteries are used these last for approx. 2 hours.