how far up a 6" inch rockwool cube should the solution go.
 

Ron, I am a newbie, but I very interested in becoming a competent hydro-gardener. I am growing tomatoes in a ebb and flow system. I would like to know how far up the solution should go a 5.5" x 5.5" x 6" inch rockwool cube. I am watering 5 times a day for in 15min. cycles.

-your site is a goldmine! Sam @ sgolwala@hotmail.com

About an inch or two. The cube will act as a sponge to soak up what it needs. Watch for over watering. Rockwool is better with drip systems than ebb and flow because of root rot.