My feed back on the system after 6 months.
This system is very easy to use near 100% sucess. Don't worry about the light penetration, clear tubs work for 3+ weeks with out changing water and no algae, as long as you have enough air moving thu the air stone (you can add a little hydrogen peroxide to help, don't buy the cheaper bubbler brand at wallyworld). I pH at ~6 and get roots in 7-10 days. If using soil transplant when roots are ~ 1/4" to minimize shock. No nutes needed in the water, the clone powder seems to work well. I use cheap styrafoam cups with a small hole in the bottom that can be broken away from the clone when rooted, easy to label too, oh and you can usually get away with 2 clones per cup. Some strains can be cloned at up to 2 weeks 12+12.
Wish i had thought of the hole saw and smaller container,would have been much easier and neater, next time i guess.
Why are you you running ebb and flow and not DWC for flower, seems like you could get more verticle height. Very nice tutorial.