One other question I have is:
What should I do about lighting cycles/ running the "dwc" (what does this mean again) during the off hours? I'd like to run both the hydro and soil on a 18/6 to save electricity costs and still veg...but should i turn off the air pump too? I haven't been but i don't know if this is wrong or even if its okay to turn it off for very long at all...

oh 'snap', one more i just thought of
what kind of system for production of co2 should i be looking at? and plants only need/absorb co2 during the lights-on period, right?
and another:
ppm meter: ebay?

oh yeah...in response:
i had just finished flushing the soil on that one to get the ph right...hopefully it will bounce back
start ferting soil when three pairs of leaves (not cotyledons), correct?

and should i increase humidity levels in grow room or leave them be?