As far as timing for watering goes I'm afraid I cannot help you--I have a bubbler system that runs 24/7 so I know nothing about watering times or anything--sorry. With your numbers--they sound good--ph will travel around and I remember reading somewhere that it will rise as parts of the plant die off. That may be wrong but that's what I remember. I try to keep my ph between 5.6-6.1 (6.2 on a lazy day) but anything withing that range I don't worry about. I was taught that when in doubt go with less nutes...lower ranges may slow them down but won't kill them...too many nutes will. As for humidity Ill probably hear about this but honestly I don't worry about it at all. I grow from seed so don't know much about clones either although I know they do like humidity. You need someone with more experience than me to answer your questions about timing and humidity etc. I would start a new thread with those two questions and see what you get. Watch for any new growth popping up from your kids--I don't think that the leaves you are seeing now will improve really. Any new growth would be a good sign that they are on their way back.