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Thread: Yellow new growth???!

  1. #11

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    Hydro like coco 5.5-6.2 as the range? PH lockout at 5 sounds plausible.

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  3. #12

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    Your growth has been phenomenally fast. I have never had a grow move like yours. From what I understand, the faster you grow the more dialed in you need to be.

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  5. #13
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    magnesium deficiency leaf


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  7. #14

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    I go 5.6 to 6.1 in water with no issues.
    It’s not light bleaching, I get that with my dominators in winter.

    I’d say change your feed out for fresh. PH 5.6 and EC 1.1 of mainly a&b,
    what do the root look like?

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  9. #15

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    You have a nice setup widowsmite! I bet you have a lot of fun growing. Outstanding photos of the micro nutrients being locked out! Low pH lock out. When you used that 5.5 pH, it probably dropped even lower than that, by the looks of those plants! Super learning opportunity for anyone that wants to learn. I hope you don't mind me asking. You said you use tap. I was wondering how much acid do you have to add to ajust pH? You going to start over or fix it?

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  11. #16

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    Quote Originally Posted by MonsterEnergy View Post
    magnesium deficiency leaf

    Fe looks like Mg but start from opposite ends of plant mate




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  13. #17

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    Woah thanks for the extra input you lot! very much appreciated. I had Coco pretty dialed in but now going to a system I’ve not used before it’s having its tantrums by the looks! I think I agree that it’s looking like a low ph. One of the reasons is that the feed chart for This range of nutes says 5.2-5.8 until flower. To me this sounded too low, but ya’know...I’ll listen to the folks that made it rather than go with my experience and gut feelings...bad idea!
    I used to swing coco ph from 5.6 to 6.2 and it was like clockwork. I’ll sort it out over the weekend. Luckily with iron by reading up, once they’re back on track the leaves green up.


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  15. #18

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    Not sure if thats any use




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  17. #19
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    Quote Originally Posted by gardro View Post
    Fe looks like Mg but start from opposite ends of plant mate
    nice reply gardro thanks for the info btw
    should have noticed straight away it wasn't in the mid/low section of growth


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  19. #20

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    You say you have hard water? what ec and ph is it from tap @ around 20c

    How is it getting to 5ph? did you knock it down that far? So its coco but driven by a system and extra air stones. hhhhm now could this be another case of the air stones messing with ph i wonder. probs not lol....

    However, if i gave my plants in coco 5ph they would lock out, i have had to flush a few times due to salt build dropping the ph, i have not been over doing the feed either. At the moment i am giving 5.9ph and they are healthy.

    I wouldnt start over they look good other than the color, fix the nute issues and ph and they be fine. I would raise that lamp a few inches though lad, just to back off the growth speed and over all stress on the plants.
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