Ok still looking for advice and tips on this or any problems that people can see happening in the future. The room will be pretty much fully automated ph controller, co2 controller, ac, timers and all have been bought and set up.. waiting for my lights...
Anyways here is the progress on the buckets I put text tags on it so people know whats what.. the bottom part of the net pot sits in the water all the time about a 1.5" I use lave rock as a medium... but am thinking about mixing in hydrotron with it.. The water is pumped up from the bottom and then assisted by the airlift bubbles that also add more o2 to the mix.. they overflow and drain back out throught the 1.5 inch drain line that are all connected.. i havn't run this system yet, but some close. This is pretty much just a mutt of hydro using this and that from all the diffrent ones.
I have to make 8 more buckets for the other side of the room, which will go in 4 weeks later. if anyone wants i can do a how to if you like my design.. if it works

Pic 1 this is a close up of the 2 buckets next to each other.
Pic 2 This is the system minus one bucket i messed up on.. all is glued sealed and almost ready to test rock and let run for a few days to build the benificials.