Quote Originally Posted by polishpollack
A good ppm meter is expensive but they do help alot. A cheap one will probably suffice, though not be as accurate. As long as you're in the ballpark you should be ok.

Not ebb and flow but sound like a DWC setup. ebb and flow would have the water moving into the grow container, then out of it on a timed cycle or manually operated. If the water stays put in the container, then it's just DWC. You pump air in to oxygenate the roots and keep them from drowning, so to speak. Avoid light leaks into the container as this will cause algae to grow. You might reconsider three plants and just go with two in a tub. Sounds silly, but I'm serious. If you do this right the plant mass will get to be so large to fast, you'll think these plants were brought by the aliens or something. It's ease of fert acquisition and utilization, less energy goes into the rootball and this promotes rapid plant growth. You'll see. DWC, when done right, is easy and kickass. Don't forget all the odor that they'll put out. In flower, they stink like mad.

I don't know if I would bother with the LEDs, but use them if you want.

You might consider spraying them with plain seltzer or soda water as the bubbles are nothing but CO2, which is a growth booster. This way you can put CO2 in the grow space without getting the tanks, valves, etc.
!!! Damn am I learning stuff. Thanks for sharing the knowledge dude.
Ill definitely go with the two plants in the garden now, should I put them as far from each other as possible or closest to the oxygen pump ?
Will a air purifier do for the smell or ill need something much stronger ?