Stream of Bubbles in my loop - advice pls

[AFK_Matrix]

Ok just redid my loop and fitted a fuzion, EK 8800GTX and an EK Asus NB/SB block. They are fitted in that order.

Now my reservoir is an Aquatube mounted to the top of the case with a t-line blow it. Now the NB block feeds back into this t line and then this goes on to the pump then the rad.

So loop is:

Res -> pump -> Rad -> Fuzion -> EK 8800GTX -> EK NB - > Res

Now what i have got is a stream of bubbles appearing in the tube that goes from the NB block to the res. Just wondering if i leave the top of the Aquatube for a few days and run the system will these bubble eventually disapear, as there are small bubbles comming out of the aquatube? I have already moved the case around and tapped/squeezed the tubes.

 

[AFK_Matrix]

Ok Thanks Fizzy and w3bbo.

Will have a good look around the nb, although I did have an issue with a tube near my reservoir. Basically I hadn't pushed the tube on enough and the last ridge of the barb wasn't covered, this probably let air in. But will tighten up all the fittings going to the nb block.