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burn at so low PPM

Discussion in 'Hydroponics / Aeroponics' started by SamWE19, Feb 13, 2018 at 4:01 AM.

  1.  
    rkymtnman

    rkymtnman Well-Known Member

    i'm at high altitude and my plants burn easily. i don't go above 1.0EC usually for the whole grow.
     
  2.  
    SamWE19

    SamWE19 Member

    Thank you for saying that for my sanity it explains a lot. I'm currently at 0.96 ec

    I'm very low altitude only 50m above sea level but I have low humidity would that cause it?
     
    rkymtnman likes this.
  3.  
    SamWE19

    SamWE19 Member

    Does that 1. Ec include the ppm in your water?
     
    rkymtnman likes this.
  4.  
    MrStickyScissors

    MrStickyScissors Well-Known Member

    Get the ro stealth 1000. 1000 gallons a day
     
  5.  
    rkymtnman

    rkymtnman Well-Known Member

    i'm low humidity too so a double whammy.

    when i was using FP, i started at 1mL/gal and i think my max dose was 2.5mL/gal (i think)
     
  6.  
    rkymtnman

    rkymtnman Well-Known Member

    i usually try to use RO water. makes life easier for me. i only use 10 gals a week though.
     
  7.  
    SamWE19

    SamWE19 Member

    Yeah I'll try again with my Ppm's insanely low and see how it goes.

    I can't use a RO unit as I don't have a tap in my grow room I fill a bath and then pump water to the resevoir. It would take me 24 hours to refill the water in my tank even with the largest unit
     
  8.  
    Smok3yMcChok3y

    Smok3yMcChok3y Well-Known Member

    I dunno I'm at sea level and have very high humidity and warmer temps. I feed at starting at about 750 at flip to 11-1200 full tilt. So maybe that's the correlation. I notice when I run my dehumidifier to 40% rh or so they definitely drink more water.

    Edit: not sure of the scale used to calculate ppm as I'm using a 20$ tds stick
     
  9.  
    SamWE19

    SamWE19 Member

    My humidity at the moment is 22% but I'm hoping after I buy an AC unit and switch off my huge exhaust fan and go sealed my humidity will rise and I won't have this problem.
    Any humidity that the plants create at the moment is instantly sucked out the exhaust.

    Hopefully humidity is the answer and feeding at such a low Ppm will solve the issue
     
  10.  
    eyderbuddy

    eyderbuddy Active Member

    Read the entire thread and i still can't find an answer to this. I've never heard of a problem like this... Do you use anything else for your reservoir other than what you've mentioned?

    Also, just as a recommendation, try to steer away from PPM measurements because of the different in scaling, and try to always use EC, it's just a more reliable way to measure.. And since you've been using the 500PPM = 1 EC scale, then... Maybe? For instance, I've had landrace strains that never liked going over 0.8 EC as they would show similar symptoms with the leaves curling down.

    But the yellow on your leaves look like either a deficiency or lockout... Which only serves to confuse me.
     
  11.  
    SamWE19

    SamWE19 Member

    Only reason I use ppm is it changes more often. I can see the ppm rise by increments of 10 but it would take a larger drop or rise before I see an EC rise of .1.

    I do check my EC regularly aswell I just don't get it.

    I have emptied and refilled my res with 1ml/gal foliage pro and 0.5ml a gal protekt today and got 380ppm so will see how it goes hopefully I start seeing the ppm drop as if they are eating.

    I don't use anything else at all. Just foliage pro and protekt.

    I'm thinking maybe it is my low humidity and maybe sensitive plants time will tell
     
    rkymtnman likes this.
  12.  
    rkymtnman

    rkymtnman Well-Known Member

    I know you said it would be hard/impossible, but you need to use RO water. i just read that your starting water is 160ish. that's pretty hard. my well is 0.28ec (140ppm) and i mix it 3 to 1 with RO to get an EC of 0.1ish.

    if not RO, you should look into finding GH flora trio that has the hard water version of micro. either that or Ionic hard water formula. if either one is still even available.
     
  13.  
    southernguy99

    southernguy99 Active Member

    Its not the water or nutes fix your environment your choking your plants out.
     
  14.  
    drgreentm

    drgreentm Well-Known Member

    Dam, how large is your res? I have 150 gallon res in my room and use a stealth 150 and works fine.
     
  15.  
    Grandpapy

    Grandpapy Well-Known Member

    It will turn your nutes to a solid and lockout your plants.

    You should be adding around 2.5-5ml per gal.
    DG_feed-chart-1.jpg
     
  16.  
    SamWE19

    SamWE19 Member

    My res is 300 gallons even if I bought the stealth 300 waiting 24 hours for enough water to fill my tank would probably kill my plants as they won't get any water sprayed on their roots until the res is filled above the pump
     
  17.  
    SamWE19

    SamWE19 Member

    So you reckon it's the humidity that's causing this?
     
  18.  
    southernguy99

    southernguy99 Active Member

    with out question your environment is your biggest issue you need to fix first , but you have others as well. get a humidifier and set it to 70%. how many plants you running and what are they in?
     
  19.  
    JSB99

    JSB99 Well-Known Member

    Even though it's a lot of water, I'd do a flush and let them try and recover for a few days. The plants will use their stored energy, and hopefully correct themselves. You might have nute lockout, so fresh water should help. Then, start adding nutes a little at a time, over several days, until you're at your target TDS. See how your plants are doing each day, and stop when your plants are happy, rather than going just off the TDS. Different strains have their own tolerances to nutes.
     
  20.  
    JSB99

    JSB99 Well-Known Member

    And, post some pics and info of your grow. As noted above, your environment may be contributing to them problem. Add some humidity. Check out my Fogger link below my signature for an inexpensive, and robust way to do this.
     

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