I think that the best growing system ( except aero ) is the centralized bubbler with water circulation from the main tank to the growing buckets. That's the way i enhanced my bubbler system ( very easy to build it home made ). This way, the water level is the same in each bucket, and control in only the main tank as for PH and EC. To adjust nutes and PH, i need to wait a water circulation cycle though. Results : next crop ...
Fhydro