Can you sink the drip ring down into the hydroton? And if you put a collar, cone, etc around the stem, make sure there is good air flow.
The Serenade starts working immediately and fights fungus.

I am concerned about your droop though. That's not a good sign. If I see unexplained wilting, I mist with neem oil- lightly!- and raise the lights until I know I have found the cause. Can you get pics of the whole plant?