Aqua-pro 1 Help

[JA5ON]

my aqua-pro 1 extern filter keeps making funny noises and blowin bubbles its been doin it for a couple of days now. there are no leeks on it and i cant understand how the air is getin in there?

 

[JA5ON]

bump

 

[JA5ON]

pls help cos a think am just goin to buy a new filter if no one gets back to me!!!!!!!!!!!!!!!!!!!!!