euroreef rs80 problems

[gobytron]

Hmmm...
it seems obvious on the surface that their is an airline clog in the venturi line or valve...

It sounds like you've thoroughly checked this out though...

I know on almost all the venturi skimmers I've used I just pop the air intake valve off as they clog up too easily/frequenly...

I also replace the Venturi line (if the skimmer design allows for it) a few times a year....

If the pump is working fine and pulling water no problem, the issue should be within the venturi valve or line itself...