Rhizome!! Always good to see you. Would temps that low destroy those roots like that? I've just never seen such a thing.....

You know I love both Jorge's book and Greg Greens book but I honestly don't use either one of those as a hydro guide. I have a feeling both were written slightly before hydro took off so madly but I'm not positive. I AM sure that I don't use their hydro information as a rule. Most of it is too vague anyway. BUT I do find both those books VERY useful in general so I refer to them constantly for other information.