It pretty simple, all the buckets are connected with PVC that runs to the pump, each buck has a drain to the main res below it, it is a 40 gal e&f tank from local hydro store. With the drain pipes (1") make them as high as you want your water, since I need to flood more when they roots are not out yet I have a longer tube. Then I put the shorter one on when I have roots. The rest of the parts I use are listed in my first post for veg room.