Just transfered one plant from the cloner to the veg system. I'm using a 400w and a 20gal resivoir where the water flows directly on to the clay pellets and drains back to resivoir. So my question is do I run the light for 18hrs and off 6 while water 24/7 or do I need to time the water as well? Using general hydro flora series nutes. This is my first attempt at hydroponics on my own so I do appreciate the useful info.