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Old 04-03-2013, 04:27 PM   #1 
WaffleSire
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Thumbs up Sponge Filters Without Pumps?

Heyo, people! I had a question.

I not-so-recently discovered [i.e., read about] the joys of sponge filters in the "Sponge Filters: Why and How" thread. But, I couldn't understand why they needed air pumps to work. I understand the air line goes into the plastic tubing and "pushes" the water out, but without the tubing, wouldn't the water just be moved out on it's own?

Or, is it that the air pump aids in sucking up water to be filtered by the sponge?

Would a sponge filter work without a pump?

If someone could please explain the mechanisms of a sponge filter to this middle schooler, that'd be swell.
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Old 04-03-2013, 04:42 PM   #2 
LebronTheBetta
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The pump pushes air through the tube into the filter to create the bubbles which is basically the water getting out through the sponge. Without the air pump, the water won't be able to be pushed through so basically nothing is happening at all.
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Old 04-03-2013, 05:44 PM   #3 
WaffleSire
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So the water gets pushed out of the sponge, and not the plastic tube?

I'd always assumed the water gets sucked IN through the sponge, and the bubbles push them up out of the tube. 0.0
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Old 04-04-2013, 03:08 AM   #4 
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The air is pushed from the pump through the airline tube and into the center of the sponge filter. The bubbles that go up the uplift tube push water out of the way. This creates a vaccume and allows the water to enter through the sponge.


http://www.americanaquariumproducts....iltration.html

Without an airpump or powerhead - nothing is going to happen.
It's pretty primitive but sponge filters are suposed to be superior at biological filtration. Plus they are better for bettas then the power filters because they do not distrube the water as much. Most of the other filters need to be modified because the water flowing out of the filter creates too much of a current for most bettas. They like still water.

Last edited by Tikibirds; 04-04-2013 at 03:14 AM.
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Old 04-04-2013, 08:37 AM   #5 
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I couldn't have explained it better myself lebron and tiki
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Old 04-04-2013, 09:49 AM   #6 
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You can also use a sponge filter with a powerhead, where water is forced into the sponge, to flow out through it ... basically the reverse of the air pump sucking water into the sponge.

This wouldn't be good for a betta tank though, considering the flow issues.
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Old 04-04-2013, 07:20 PM   #7 
Tikibirds
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I couldn't have explained it better myself lebron and tiki


I am thinking of putting 2 small sponge filters into my divided tanks - one on each end instead of having the HOB on one end and nothing on the other.
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Old 04-04-2013, 07:32 PM   #8 
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All of my tanks have sponge filters. I LOVE them, and will never have any other kind. They are effective, long lasting, and easy to use and clean.
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Old 04-05-2013, 09:01 AM   #9 
waterdog
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Quote:
Originally Posted by Tikibirds View Post


I am thinking of putting 2 small sponge filters into my divided tanks - one on each end instead of having the HOB on one end and nothing on the other.
I have the same thing in my divided 10 gallon and it works great!
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Old 04-06-2013, 11:15 AM   #10 
WaffleSire
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Well, thank ye' guys! All makes sense now. Never stopped to think about vacuum pressure, sort of assumed it was just bubbles and water. o.o
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