laurasmithuk
Fish Addict
how often do i need to change sponges in juwel tank filter? do i change them all at once? 

Care and maintenance of the JUWEL Filter System
1. Maintenance of the Filter System The JUWEL Filter System requires very little maintenance if you follow the following instructions.
– Replace the white filter wool pad once a week. If you have
large fish, then this may require changing slightly more
frequently. This will ensure that the filter sponges will not
be clogged by larger dirt particles.
– Replace the black activated carbon sponge every 4–6 weeks.
Again, if you have large fish then this may be to be more
frequent. This ensures that any chemical impurities from
the water will be removed. Please note that the chemicals
which are absorbed by the activated carbon contained in
the sponge, will be released to the water again if the
change intervals are too long.
– If the filter wool and the activated carbon sponge are
replaced as suggested, then it is sufficient to carefully
clean or replace the coarse blue sponges at 6–12 weeks and
the fine blue sponges at 3–6 months only.
Important – Cleaning or replacing the blue filter sponges
will affect the bacteria cultures. We recommend therefore,
that only one of the sponges at a time is cleaned or
replaced, never at the same time.
You do not need to worry about the liquid dirt
accumulating at the bottom of the filter housing. Normally,
this dirt contains important biological substances which
enhance the water quality.
Please do not worry if some dirt gets into the water during
the cleaning process causing cloudiness. After the filter
system is back in operation, the water will soon clear
again.