clogged pool filter

[PoolDoc]

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.

[brutuszada]

wow! Some great responses! I did fill out the PF form as requested and i am going to attempt some of the suggestions. You all are so helpful - thank you SOO much! I will let you know what happens - wish me success!