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Sponge Filters?


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am I right in thinking sponge filters don't use electricity?

I feel really stupid asking this but I've just ordered one and Im not entirely sure how they work >.<

They do use electricity but in the form of an air pump, the bubbles are released at the bottem (inside a tube covered with holes and encased in foam) then move up thrugh a vertical pipe, creating a flow of water through the foam and up the tube, the flow is gental enogh to be used with fry and that is why it is so popular. hope u understand because the first time i looked at one(on my biorb) i was stummped :D but if you understand it thats great.

hope i've helped

:D Gaza :D

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