Tropical Fish Keeping - Aquarium fish care and resources

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-   -   diy sponge filter help (

stevenjohn21 03-17-2011 12:10 PM

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?)

turtle10 03-17-2011 12:41 PM

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

stevenjohn21 03-17-2011 12:51 PM

Thats what i thought ! i couldnt see how blowing air out would suck the debris in.
This is the link i saw: -

DKRST 03-17-2011 12:53 PM

Yep, very simple to make, simply doesn't work.
It's a big yellow airstone!

turtle10 03-17-2011 02:51 PM

Haha that person has it wrong, like DKSRT said it is one big airstone! lol

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