I was taking down some of my boxes and found that just after 3 days the soil layer was bone dry. Roots totally packed the soil layer. I had noticed that when watering twice a week they were taking less and less. Just figured they didn't need it. But when I removed the soil/reservoir "cover", what should have been water was half full of what appeared to be worm castings. Roots were so packed into the wick tubes I had to pound em out.
Kind of surprised to see all the castings in the rez as the hole in my cover are only 3/16" vs the 3/8" of the EB's. Guess I'll have to start watering more frequently as time goes on and/or put screen over the cover holes