Did a bit of reading on the terrafibre cubes and it seems they are better suited to a flood and drain system, than a drip. I believe, once they are allowed to dry, they take up to an hour to re-soak. This means the 90 min feeding I give a few times a day, will never keep them hydrated. I decided to flood the plants twice a day instead of having a drip. It works much better and I could see results in only a few days. I dumped 10 gallons of nutrient in by hand into the tray, let it sit for an hour or so, and sucked it out later with a hose. Something more permanent coming in the near future, I just wanted to see if it would work. The leaves are getting darker and the buds are really starting to take off. I got this problem sorted out just in time. :) BTW I am flooding twice a day; 2 hours after the lights come on, and 4 hours before the lights go out. It seems to be doing the trick so far. I am getting excited about the next round already.