Micro bubbles, help!

[Snoop Dog]

I added a closed loop to my tank at Christmas. I went with a T4 with a 1 inch intake, and two 3/4 inch returns. I cant figure out where the bubbles are coming from. The intake is 1 inch and sealed tight, I can here little noises of bubbles getting chomped by the impeller however I cant figure out where the air is getting in?

Has anyone else had this problem? the pump seems bullet proof and I dont believeit is getting in there. All connections are clamped tight with hose clamps. Thanks for any help, heres a few pics I cnat figure out how to just post them so ill put my URL.

Thanks for your help

[/url]http://www.msnusers.com/Yakstankpics/shoebox.msnw?action=ShowPhoto&PhotoID=18
http://www.msnusers.com/Yakstankpics...<br /> <br />