What Color is your res? If you say white or clear or anything other than black or something just as dark, your never going to solve your problem.
Not only do you have one super bad case of root rot, I'm going to tell you something harsh. Your plant is dead. It's not going to pack on anymore weight, or streach, or anything. It will however continue to mature. The trich's will turn from milky to amberish, then that's it, chop her down. The smoke isn't going to hurt you, anymore than anyother smoke would, so don't be worried about that, but it's just not going to get any bigger. If you would have caught this sooner there's three products that I would recommend to you.
1. h2o2 bath~
Go to any grocery store, and pick up some 3% topical solution h2o2, it's like a dollar. Dilute the solution in a 12:1 ratio, so 1 cup h2o2 12 cups water. Let the plants soak in this for about an hour. Airstones not necessary in this bath, because the h2o2 releases o2. You should see/hear little bubbles coming from your roots, this is a good thing! After their hour, rinse them off really well, and go prepair their new solution.
2.SM-90
This shit rocks! Get some at your hydro store. It's a natural wetting agent, but on top of that it also protects against phylum, or ROOT ROT. Seriously look into it, then buy it and use it...
3. Roots organic Organism
I recommend this because I have never added one product to my res and seen such dramatic root growth. This stuff brings roots back with a vengence. It's a powder so make sure that you mix it in really well. It introduces a natural organism into your res, that stimulates the hell out of new root growth. Perfect to use right after you fuck things up, I look at it as my get out of jail free card from monopoly.
Other than that, chalk this one up to trial and error. but be happy, your still going to get quality smoke off this lady, just not as much as you could have. Hit me up with any ? and I'll try to help you out, take a look at my journal to see my trails and errors in my past and current DWC's.
& Good Luck!