man my plants are only a week old, but the nutes in my res are about 75%... a couple plants started to yellow a tad and show calcium defiancy so i had to up my nute strength.. so i say, let your plants tell you, every system is diff... i am using a dwc/wick, with hydroton... i foliar feed every now and then a slightly weaker version of the nutes in res.

i am experimenting with 24 light for about 3 days, and i am getting good results, i just had to find a way to keep humidity and temp right at the plant level. i will give them their first nighttime tonight....

and ya, you are describing when they fall off