I thought I would share some knowledge on how we do it.
It is remarkably simple !
Step 1: What You Need
A fountain pump
Big Plastic Pipes long and wide enough to hold plants - we use 4" (100mm) soil pipe
A Large tub - water tank
Plastic Net pots (Or ones with lots of holes in for the roots to escape out of)
pH meter or something of the sort (This is important)
Power socket x2
Nutrients (we use Canna vega and Canna flora)