diy sponge filter help - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 5 Old 03-17-2011, 12:10 PM Thread Starter
stevenjohn21's Avatar
diy sponge filter help

I have a 2.5 gallon tank for my betta and i bought a small filter (whisper internal filter with air pump) The filter is too big to be placed inside the tank so i decided to use the air pump and make a diy sponge filter.

So basically i place the air tube thats connected to the air pump inside a sponge about halfway. I turned it on and bubbles are coming out of the sponge but it does not seem to be sucking the particles into the sponge.

What am i doing wrong ? Also how does air blowing into a sponge make debris suck into a sponge ? surely it would just blow debris away right ? (how does it work?)
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post #2 of 5 Old 03-17-2011, 12:41 PM
turtle10's Avatar
Lol that is now how you make a sponge filter. That just blows air through sponge. The air pump blows out air, not in.

Here is a good link:
How to make a DIY sponge filter [Forum - DIY] : American Livebearer Association
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post #3 of 5 Old 03-17-2011, 12:51 PM Thread Starter
stevenjohn21's Avatar
Thats what i thought ! i couldnt see how blowing air out would suck the debris in.
This is the link i saw: -
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post #4 of 5 Old 03-17-2011, 12:53 PM
DKRST's Avatar
Yep, very simple to make, simply doesn't work.
It's a big yellow airstone!
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post #5 of 5 Old 03-17-2011, 02:51 PM
turtle10's Avatar
Haha that person has it wrong, like DKSRT said it is one big airstone! lol
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