I hope no one immediately puts me on the "bandwagon" or their hate list for posting this as I'm not trying to pet anyones ego or anything of the sort. Just a stupid noob to hydro, though I have grown in soil quite a bit. But as a stupid noob I can provide my response without any bias - just what has happened to me in the last 48 hours.
To be honest - I had no idea you could add feeder tubes to your DWC system to feed your seedlings. I have to say I probably would have been nervous as a newb leaving this all to the bubbles knowing that I could build in a feeder tube system but 48 hours later - I'm glad I did. Looking back, I think I really would have complicated things for myself. I had filled my res to the bottom of the net pots with a good amount of bubble action going. (Though more will be added later!!

) All of my media is moist as well as the net pots themselves all the way up to the lid line. I hand watered within the first 24 hours and I haven't since. When I checked this morning my res had dropped just a hair over an inch since I started the system up 48 hours ago. (Extremely dry here, 28-32% RH lately) All of my media was still wet right up to the lid line. I would feel confident that even dropping another inch in the next 48 hours would not have affected the plants. However just to be safe, I pH'd up some water and added it to the res to bring it back up to the bottom of the net pots.
To be honest I'm kind of mad I didn't start out growing this way as I seem to have a lot more control over what is going on vs soil and its slow response time to corrections. My pH was off a smidge this morning and with a little pH down - I'm right back to a perfect environment. However everything you read is that Hydro is so complicated and so much more labor intensive. Though I feel I'm doing a little more maintenance... I'm also not worrying as much and staring at my plants waiting for the first signs of anything wrong because I know it will take up to a week (or sometimes longer) to correct.
I can't wait till my roots hit the res water so they really take off. The last 12 hours was the first good amount of new growth that I noticed since they were placed in the system from soil.
Hope this helps someone. Not trying to discourage anyone that is using feeder tubes already or anyone really. Just tossing this out there so someone can make an informed choice knowing its working just fine on the bubbles for me. And I know nothing when it comes to bubbles at the moment! lol