Quote Originally Posted by SpaceNeedle
That's your problem. Cubes, ESPECIALLY Large cubes like yours are not meant to be in a DWC, you will drown your plants, or at the very least they cannot thrive. When there is that much rockwool it will never get a chance to dry so that your plant gets oxygen.
SpaceNeedle, please get your facts right before you post.

#1 - Rockwool and hydrotron work fine together. A lot of growers use them that way - a smallish RW cube to start with, and then set that in a net pot full of hydrotron.

#2 - Rockwool and DWC systems work fine together too. Again, a lot of growers have done that.

#3 - In a DWC your grow medium does NOT need to dry out and your plants won't drown. Think about it - in a DWC system your plants sit in a big bucket of water. Oxygen is added directly to your nutrient solution by the air stones that should be running constantly. Additional oxygen from the air is not necessary.



To OP: It's normal for it to take a bit for your roots to reach the water line, and it's also normal for growth to be a tad slow until that happens. You may want/need to hand water (use the water out of the reservoir if you can) a few times a day to keep your plants happy and speed things up a bit until then. Otherwise, as long as your plants are healthy, just be patient. You could also set up some sort of drip line that feeds out of the res, if you want.