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Question about sponge filter

This is a discussion on Question about sponge filter within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> That one looks like it has a attachment for a airline right by the suction cup, so you would just need to attach a ...

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Question about sponge filter
Old 04-19-2009, 02:37 PM   #11
That one looks like it has a attachment for a airline right by the suction cup, so you would just need to attach a airline to it. If it didn't have that you would have to run a air line and airstone down the tube. Sponge filters work by the bubbles rising up, as they rise they pull the water up with them. So the water in the tube is flowing through it with the bubbles. Water is then constantly pulled through the sponge to replace the water that is constantly being forced out the the tube by the rising bubbles. The sponge area is were most of the bacteria will colonize.

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Old 04-19-2009, 05:36 PM   #12
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I personally don't like sponge filters, or anything air pump driven just because they are so loud. Even if you get a quiet pump, the bubbles coming up to the top can get annoying. If it were me, I would get an AC20 to hang on the back. That would be easiest to move to a QT if you ever needed to.
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