Can you make a list of everything I need? Right now I have an air pump airline tubing and the sponge filter, is that all except the check valve?
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yup the check valve is all you should need. they can be picked up for a dollar or two at any pet store. I had a very similar sponge filter that worked very well. One tip is when you first put the sponge in the water squeeze it a bunch of times to get all the air bubbles out of the sponge.
One other thing you might want to get is a three way or gang valve. These allow you to take the output from the air pump and split it amongst multiple "outlets". Let's say you were running two sponge filters. It would allow you to run both from a single air pump. It also allows you to control how much air goes to each outlet. So in case the sponge filter needs less air going to it, you can reduce it (by routing some of it to another outlet).
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