Quote Originally Posted by zoomatl
I have discontinued the use of the flood drain pump and when the cube dry out to where they need water i will go back to watering by hand like b4... ...
I think that you'll find this will solve your problem. Rockwool can indeed be too wet and it's east to get to that point.

Once they dry out, put them back in your system and hand-water them only as frequently as they need it. This should allow the roots to grow into the hydroton while keeping your rockwool from becoming overly-wet.

When the roots have grown out of the cubes, try to set up your ebb and flow again. This time, keep the rockwool out of the nutrients and let only the roots flood.