air clogging drip lines Help

Heynow RIU. I have a 4x8 flood tray, with a 1/2" poly manifold/ main line running around the edge of the tray, with 32 feed lines comming off and running to 2gal buckets. The feed lines just have a T at the end of each line, nodrippers or rings. The main line is connected to a 500gph pump in a 30gal res under my table.

Every time I plug in my pump to water 1 or 2 or 3 of my feed lines are not dripping. They are always feed lines on the far end of table to the pump/mainline connection.

So then I pick the feed line up out of the holder stake and lay it down on the tray the water will start running out. And then when I put it back up in its bucket it will keep running. I think that its an air bubble clogging the line somehow.

I set this whole drip thing up because I leave town alot and need automated watering. I have to leave town again next week.

How can I prevent the lines from clogging?

Here we go

Hell yeah im a pic posting pro.

Ok so heres a pic of the area where the lines seem to be clogging up the most. This is at the far end of the table as the pump inlet. The pump inlet is at the low end of the table, the same end as the drain. So that the runoff runs back in the res and I dont have to run a hose from the pump to the far/high end of the table.

Do you think if I reversed the way my manifold is sitting on the tray. So that the pumps inlet is at the high end of the tray. That the gravity helping even the pressure would solve my problem?

that might help but i know if you got a bigger pump say like a 700-800 gph pump It would flow fine then you may be able to reduce your time of feeding too

It only takes 2 or 3 minutes now before they have runoff. So will just getting a bigger pump solve my problem? I was thinking maybe I should get some kind of check valve to keep all the lines primed. You know