Hey thank you bro, i went for a pump that pumps 250 litre an hour, it has a shutter so u can adjust the flow though, as for the diagram i have changed the setup a bit.
All 4 pots now have a micro tap, i went and got 8mm and 10mm clear tubing but screwed it up and kept it aside cause it was too thick to build pressure, went for thinner back tubing cause apparently clear tubing cud build algae, ill take a picture of the setup later when lights come on so u can have a better look, i have to tweak the flow rates tonight and get things sorted cause tomorrow im leaving possibly till monday, i also have to tweak the level of the bucket id say just below where the pipes are is chilled or u could play around to see what u prefer, no doubt if u keep the bucket above it will siphon all the water and flood your pots lol, i did find that out while building, i thought the pump might of had a back pressure valve or sumthing but i was wrong although i could just buy one i guess. Peace Don !