I'm doing DWC now, with two buckets, look at my other posts to see pics in progress... they got out of control... let me rephrase... I let them get out of control... they were so big I had to do some serious topping... anyway... at first you won't need to fill the <a class="inlineAdmedialink" href="#">water</a> as much, but once they get big... they will drink water faster than you can believe. My plants right now have been in flowering for a week after a 6 week veg, and I fill the bucket up to 2" from the top... after two days a third of the bucket will be emptied. I've done Ebb and Flow, which is more difficult to setup and I see no advantage to either. All depends on your budget, and how much you want to be involved. The one recommendation I can say, is I've tried the PowerGrower drip system from GH... and realized with just a seedling, there is so much water-to-air contact that the water evaporates almost 5 times faster, and thus you're filling it up every other day... not a good system. Sorry, I type a lot... I get excited about hydro.