that was a HUGE help i didnt know if my posts could even be read you were the first to respondhey man, don't know anything about hydro growing, but if u posted a thread in the hydro link instead u may end up w/ more responses to ur question. Wish I could help more.
ebb and flow!!depends on your hydroponics method. DWC? Ebb and flow? SWC?
For ebb and flow the most efficient way to do what you talk about (lifting the plants themselves up and redoing the trays) would best be done with a bunch of plants in one large rockwool slab.