Instructables

Step 4: Testing

Before installing your new filter in your aquarium you might want to test it in a Jar full of water. You will see the water coming out of the Tube.

 
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lukeD10 months ago
is it possible to make such an air punp yourself?
aabayoe2 years ago
Mission accomplished..! i already make it, now i dont have to buy expensive water pump anymore for my second tank...thanks
guyquiengco2 years ago
This is great! I just bought a filter and it seems too big for our aquarium. I'm gonna hack a filter using your instructible.