Im thinking of running a 1/2 pipe along the bottom in two rows inside my RDWC trough , if I were to add up the length of pipe under water it would total about 4mtrs .

Im thinking of drilling a cluster of small holes under each plant .

I have a Pond One 02 8000 air pump, 4200ltrs per hour, Max pressure 0.038 mpa .

My question is will the airpump clear the water out of the entire tube and blow bubbles out of all holes or will water pressure make it so less than all holes will bubble.

Here is the root system that I want to have this sit under., plants are 70cm apart, trough is 60cm wide 2mtr long and 40cm deep with 3 plants, roots fill entire bottom 20cm thick .