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    Help Needed

    Think these guys got ya sorted out I wouldn't go chasing to many parameters. Keep temps over 65F at night and over 70 day with good airflow and you should not have a problem
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    Help Needed

    Leaf temps or air temps?
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    Over watering in flood and drain tables?

    Looks more like under watering to me and you have some nutrient uptake issues. What is your PH. You need to up that humidity to 60%ish in those temps. Pic of the roots might help also
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    Help Needed

    Yeah its a root problem. +1 over watered. Where are the drainage holes on those cups?
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    slowwww growth

    Lets see a pic of those roots in natural light.
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    Tail of the Fox? Check in with my grow. foxtailing, nutrient questions

    I would lower your temps a bit and RH those are pretty high for late flower. Personally I would say around 72F and under 40% humidity
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    Seedling purple stems :-)

    I'm going to say root temp.
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    Learnt my lesson with 3000k for vegging: DO NOT use it at this stage.

    Seedlings should be 10,000 lux max. Its not the spectrum.
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    Quantum board advice - all white? Or add IR red too?

    This is going to get a debate lol. I would add IR personally It's supplied in nature and provides some benefits to the plants e.g. raises leaf temperature, and increases photosynthesis rates and helps regulate node spacing (i can tell you from experience my HLG-600 3000k with no added IR my...
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    Do bloom boosters make your bud taste like shit?

    Just a question on this to get your viewpoint. If most nutrients are stored elsewhere than the bud, why would overfeeding then be so much of an issue? I personally don't flush or starve the plants but am cautious not to over feed so I stick to lighter feeding as I get later in flower. Just...
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    Purpling??

    I was going to say its possibly the leaf temp with LED lacking IR spectrums. I had this happen to me and was resolved increasing my air temps. I use VPD and take leaf temp into account so i noticed that exact phenomenon with my HLG 600 that provides virtually no IR its not uncommon that my leaf...
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    Ph question

    I think he was referring to the drop in PH when you are swishing it around as opposed to still water. If not I am mistaken.
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    Venting for C02 in sealed room

    Ghetto yeast/sugar Co2 generator temporarily if i was stuck in your situation but get the real thing as fast as you can.
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    Ph question

    Yep
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    Ph question

    Circulate the water then use a cup to take a sample and measure the PH. Because of the way a PH pen works moving water can cause the PH reading to be lower so you want to measure still water that is mixed well for the most accurate reading. You can see this by putting your PH meter into your res...
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    Basic VPD Chart

    Going to add this link and its important to add that this particular model is most accurate at 14" from the leaf...
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    Basic VPD Chart

    They make several that do just that. There is a flaw that most people don't take into account that leads to issues when someone unfamiliar with VPD tries to employ a chart like above. You need to take into account the leaf temperature or things CAN go wrong very quickly. But i still feel its a...
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    Water Chiller

    I'm just curious do you run a chiller or not? Yeah roots just look a bit stained from nutes but healthy in my opinion.
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    Strange preflower

    not sure what your talking about
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