03-17-2011, 01:10 PM
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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?)