Have you tried a foliar application of your grow nute @ 25-50% of standard dose?

I'm also wondering about root zone issues- what do your roots look like? What's the res temperature?

Are you still using that Hanna that won't calibrate?
rhizome Reviewed by rhizome on . Nitrogen Mayday! My nitrogen deficient plants are getting worse! I don't know what to do! Pretty much all the large fan leaves of the one plant have been consumed, and now my best looking plant is starting to turn really yellow towards the top. I am on day 23 today. What the F should I do? Rating: 5