Broken Air Stone?

[DiddleBug]

Today i noticed my fairly new (a month old I'd say) air stone pumping out bubbles like regular-just the bubbles didn't pop very fast, and so they were covering the top of the tank.  It looked like a huge gourami bubble nest!  I turned it off and checked everything and it looked fine.  Yesterday I saw the pipe had gotten bent in one spot (thanks to my little sister), but I put it so it wouldn't double over and stop the air flow.  My water is clean, so I think my air stone is the one that has a problem.  Help please?  

 

[singlecutguitar]

Have you change your air stone ? I've read it in somewhere that air stone must be replace for maximal untilization

 

[DiddleBug]

 just got it though, if i needed to replace it that would be a rip off.