Quote Originally Posted by fireman25
What is wrong with her......

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temps stay between 68 and 78.....%RH 50 - 60.......about 4 weeks into flower....using latewood recipe ( 0 - 1 - 2 )..... ph between 5.5 and 6......ppm around 850.......water is poland spring with initial ph of 6.8 and ppm of 35......using a single 150hps......single plant hydro grow in hydroton.....strain is mango......WTF is it ???

Did some research and thinking it's black mold, nute burn or phos def.....any ideas......PLEASE HELP!!!!!!!!!!

Hi, Fireguy

Suggest you re-check your PH.

Last time I saw those symptoms it was due to "Hydrotron creep"
Over time, Hydrotron will raise the PH on you until lockout occurs.
I have some that I pre-conditioned for 48 hours with PH 5.5 water.
Had to add PH-down several times to keep it below 6.0
Then, I left it sit for another 48 hours and it was back to a 7.1!
Bottom line?
If you use 'tron I'd advise you to check your PH daily.
At any rate, "it can't hurt"

Aloha,
Weezard