DWC: Day 30 of Flower PH dropping to 5.0 for NO reason

Discussion in 'DWC/ Bubbleponics' started by Meast21, Apr 16, 2018.

  1.  
    Meast21

    Meast21 Well-Known Member

    I'm an expert DWC grower and I've never really seen this before. I have 2 clones into different buckets and different tents and about 1 week ago the ph would drop to 5.0. I tried lowering the ppm from 1050 to 850 and the ph is still doing this. These are clones of clones and the previous batch didn't do this. The only thing I can think I did was remove to many leaves for light penetration, but I highly doubt this is the cause. Please help.
     
  2.  
    NGA

    NGA Well-Known Member

    Have checked your roots
     
  3.  
    thenasty1

    thenasty1 Well-Known Member

    dump the water and refill it
    waste sucks, but in the time you spend trying to nail down the problem, your plants will suffer
    if you really want to figure it out, you should post recent water parameter changes, climate specifications, nute regimen, pics of tents and plants (and their roots), etc.
     
    JSB99 and Keegan12L like this.
  4.  
    Meast21

    Meast21 Well-Known Member

    Roots are fine it looks. Water temp is 65.. Changed the nutes out and it did the same thing. Like I said I have clones from the same mother other in different tents (1 clone per tent) and both are crashing to 5.0... I have other stains using same nutes and they are stable...
     
  5.  
    Meast21

    Meast21 Well-Known Member

    I've been doing this for 5 years now and now that I think of it, its happened before around the same time in flower. Its like the plant is going thru changes and it gets weird, pretty sure it did this before around day 30 of flower years ago for no reason.
     
  6.  
    NGA

    NGA Well-Known Member

    What's your water source,how much water in system,
     
  7.  
    Keegan12L

    Keegan12L Member

    First time grow for me and I have had that issue a couple times. Not quite as low, but around 5.3 or 5.4 pH. Started happening right around 3 1/2 weeks into flower. Seems to be when it gets close to res change (I'm doing 5 gallon bucket) around day 5/6. I do a res change and things go back to normal, but then again my roots are fine. I also add hydroguard. If I try to adjust it and let it go another day or two, it continues to do the same thing until I do a res change. I'm guessing some sort of lockout or something. Pretty easy and inexpensive to change out a 3 gallon res though.
     
  8.  
    Meast21

    Meast21 Well-Known Member

    Yeah its like the nutes are old and the plant wants new nutes, so ur right..
     
  9.  
    Meast21

    Meast21 Well-Known Member

    Its dwc so right up to the bottom of the net cup or close to it. System holds almost 6 gallons for 1 plant. Using tap water, its ppm is 150 out of faucet.
     
  10.  
    NGA

    NGA Well-Known Member

    Do you flush your plants weekly
     
  11.  
    Meast21

    Meast21 Well-Known Member

    No I never have flushed my plants until the last 7 days of flowering.. Highly doubt its salt buildup
     
  12.  
    NGA

    NGA Well-Known Member

    Hmm flush very important once a week ,a flush is you take a garden hose or container pour water down threw your hydroton,drain system add your prepared nutes,your prepared nutes should have been made 24 hour ahead of time ,check ph when you mix it &after to make sure it don't change ,you do get ph swings some times with small amounts of water
     
  13.  
    NGA

    NGA Well-Known Member

    Hydroton or rockwool your medium
     
  14.  
    Meast21

    Meast21 Well-Known Member

    I'm growing DWC (hydro).. Rockwool
     
  15.  
    Meast21

    Meast21 Well-Known Member

    Nobody flushes in DWC once a week, maybe 2-3 times in flower.
     
  16.  
    Cold$moke

    Cold$moke Well-Known Member

    Whats the ppm
     
  17.  
    NGA

    NGA Well-Known Member

    I flush once a week minimum usually sooner had problem once in 30 odd years ,I'm on this site outta boredom,and was looking to get into led and internet brought me here got my shoulder hurt can't work ,most people on this site either have problems,or had them ,growing is way easy ,just trying to help you bud ,many things can cause ph swing ,a lot of people cram so much crap down there plants necks and wonder what's going on crazy shit
     
  18.  
    Meast21

    Meast21 Well-Known Member

    PPM was around 1000-1050... I thought I would try dropping it to 825 range to see if it help stabilize the ph and it didn't
     
  19.  
    Meast21

    Meast21 Well-Known Member

    Thanks.. I never have problems either. Once every 20 plants or so, the ph does this but it usually bounces back quick, but hasn't this time.. I sent u a private message by the way.
     
  20.  
    Cold$moke

    Cold$moke Well-Known Member

    Can you post pics of the plants and roots with white lights?
     

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