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Need help diagnosing

Discussion in 'Hydroponic Growing' started by S Dot, Apr 25, 2020.

  1. #1 S Dot, Apr 25, 2020
    AA6CB2F5-F54E-4B5B-8EF3-82C9684AD23C.jpeg 6E93B342-2776-468A-845B-5B236FE057E7.jpeg 08CE6330-67B4-40D6-AB4C-F0FA6A886A48.jpeg CE70BCE4-1333-465F-93E7-25283C0E7B31.jpeg Hey All,

    I have two plants that are just coming up on the end of their first week of 12/12.

    Both are doing strange things and I don’t know if I should be concerned or not. Seeing as there are two plants and they have separate issues - To avoid confusion, I think it makes most sense that we address each one at a time.

    Attached to this post are pictures of “Plant A”.
     
  2. #2 S Dot, Apr 25, 2020
    16AA5530-3207-4FD1-B0C4-4CAEF28ECECD.jpeg 2C1B7299-6993-435E-A53A-452F13F0CACF.jpeg 260AF5D7-E02B-4A14-AE98-9E0514E3EC41.jpeg Here are pictures of “Plant B”...

    it’s the little brown specks/ dots that are concerning with this one....
     
  3. #3 Spanish@rcher, Apr 25, 2020
    Nout to worry about mate.
    I see hydroton there so assuming there's a reservoir under it.
    Not far off perfect by the look of it but answer this lot and well dial it in :)

    What you feeding them?
    Do the ppm numbers go up or down?
    Does the ph go up or down?
    And just to be safe but doubt it's relevant, no nasty smells in the res? No gunk or nasty shit growing on the roots?
     
  4. #4 S Dot, Apr 25, 2020
    Thank you! Really appreciate the kind words!

    Currently using “Aqua Flores” two part nute solution by Canna.

    Ppms stay relatively stable. I only now just got the plants up to a about 730 ppm (EC 1.66) which based on EC is only 0.06 higher than the recommended 1.6 ec suggested by the canna feed chart. You could classify me as a “light feeder” as even up till I went 12/12 I was still below the 700 ppm mark which seems to be recommended for plants in late veg/ early bloom.

    Ph stays very stable at what I’ve heard is the “perfect” ph of 5.8/ 5.9. I briefly hypothesized that I need a slightly higher PH in flower as I’ve noticed on some charts that phosphorus uptake doesn’t really take place until about a 6.0 ph.

    Roots are looking pretty good, I had a very brief bout with root rot early on but I believe I caught it very early and now I run 22ml of “Voodoo Juice” (I live in Canada and hydroguard is not available here apparently).

    Let me know if I can provide any other relevant details. Thanks again for your help!
     
  5. #5 Spanish@rcher, Apr 25, 2020
    Right buddy here's the magic trick that people don't realise about hydro.
    All you gotta do is keep the ppm of the res dropping just a little from day to day.
    That's the money shot.
    Means the plant is drinking just a little more nutes than what's there so the mix is getting weaker.

    The ph isn't supposed to stay stable.
    It's supposed to rise during veg then drop during bloom. I realise some brands market themselves as ph perfect but its irrelevant for hydro growing.
    Hand feeding coco they're great but not for this.
    The ph will only do what it's supposed to though if the ppm is dropping.

    If the ppm rises at all then the mix is getting stronger.
    Aswell as causing tox problems. It also means certain things start getting stronger than others. Once that happens you get lockout.
    It looks like a deficit so people tend to up the feed to combat it. When what they should be doing is lowering it.
    See where I'm going with it now lol.
    It's a bit long winded but I'm on lockdown so might aswell do something useful to pass the time. I'm here all day haha :)
     
  6. #6 S Dot, Apr 25, 2020
    Lol All good! I love a good comprehensive answer.
    That said, what do you think my problem is here then on each? Or am I panicking/ worrying unnecessarily?
     
  7. #7 S Dot, Apr 26, 2020
    Any other opinions!?
     
  8. #8 S Dot, Apr 27, 2020
    I've done some more researching and it seems that when the ppm rises it just means that the plant is drinking more water than nutes or (more likely) that some water is evaporating therefore increasing the ratio of dissolved solids in the water (the ppm). This makes sense to me, since it would seem strange for the plant to suck the nutrients without taking water with it. In my mind imagine that the plant just "drinks" the water (and nutes) in whatever ratio they are mixed. Am I wrong in this line of thinking?

    If not - i might be in trouble. My PPM's have pretty much remained stable throughout the entire duration of my grow to date.

    Can anyone weigh in on my hypothesis that the ph (5.8) may be causing this issue because its too low to allow for adequate calcium and/or phosphorus uptake?
     

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