Quote Originally Posted by brutuszada View Post
I have low filter suction.
Filters don't have suction; pumps may though. I assume you mean that there is little suction at the skimmer?
+ Is your flow out of the returns reduced?
+ What is your NORMAL pressure gauge reading?

It's not too likely that leaves are caught in your pipes. Sticks could be, but those won't be removed with a shop vac.