How do you use a sponge filter???

It sounds like you need a new air pump. Good luck with breeding your bettas.
 
Okay thanks guys, I tried just the tubing, and the pump stopped. I'll be getting a new one sometime by this tuesday. Thanks for your help! :)
 
On the bottom of that pump is a rubber base. Remove the 4 screws that hold the rubber base and take a look inside. Tell me if you see a tiny nut that has come loose, typically it wil be stuck on the magnet.
 
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