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Thread: DWC PH issues - Ph dropping like a rock - Please help

  1. #16
    420 Member TheMadDabber's Avatar
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    re: DWC PH issues - Ph dropping like a rock - Please help



    Lemme know if you have any questions about the chart 😁
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    re: DWC PH issues - Ph dropping like a rock - Please help

    Thank Mad for that chart.

    OK, so I managed to get my air temperature to stabilize at 70 degrees. I have the reservoir stable at 65 degrees. That's the best I'm gonna be able to do as far as temps go.

    I completely understand how temps are important. However, I don't see how temps address my original problem of PH crashing each day.

    Based on my own scouring of the internet, PH drops in Veg are usually caused by one of the following:

    -- A bacterial / algae infection at the roots
    I feel I've already ruled that out. My roots look good and clean, the water smells clean, and I change the reservoir weekly. I also use HydroGuard in the res between water changes.​
    -- Nutrient strength is too high
    I was feeding as high as 900 PPM but have cut it back to as low as 350 PPM. Still, my PH drops by about a full point each day. I am currently feeding at ~550 PPM.​
    -- Somehow, I'm in a CO2-rich atmosphere and I'm pumping CO2 into the reservoir
    I have no way to check the CO2 concentrations in my basement so I'm clueless there.

    Tomorrow, I'll do another reservoir change and this time I'm going to use tap water and hope for the best. I've tested it to 180 PPM and a PH of 8.5. If the PH in my reservoir continues to drop each day, then I simply have no choice but to keep using PH-Up every day to get my PH back in range.
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    re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by TheMadDabber View Post


    Lemme know if you have any questions about the chart ��
    I've got this printed out in my book next to my logs and feeding chart. Very useful info. I will post my ph in the morning.

    Duke0 I will definitely give it a try next round of nutes I buy. I dont think I will run out this grow but I am definitely getting the z7 soon. Also could you point me to a feed schedule for those botanicare nutes? I am using the hydroguard and love it.
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    420 Member TheMadDabber's Avatar
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    re: DWC PH issues - Ph dropping like a rock - Please help

    In a relatively equaliberated state your Ph should only rise slowly. Check you TDS for rising falling or static levels. As well as you water level (it will never rise but static or falling, you want falling or the plants not drinking).

    That info will provide all we nees to get you on track friend!
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    re: DWC PH issues - Ph dropping like a rock - Please help

    Im 99% you need to go back down in EC aka TDS. Do not please do not put that high pH tap water in the res. 6.5 max 7 if you feel extra froggy. Add 150 ppm cal mag and not a drop of anything else. Also dumb question but your phing After adding all your nutes and supps correct?
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    re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by John1961 View Post
    I think @JD77 found the answer to my issue.

    Yesterday, I did another reservoir change. I waited four hours or so before taking the following readings:

    Air temp: 67
    Water temp: 65.3
    Humidity: 32%
    PH: 5.8
    PPM: 550

    Today, about 16 hours later, I took the following readings:

    PH: 4.8
    PPM: 560

    Water level in my 5-gallon reservoir dropped by about a pint.

    When did this daily drop start happening? About a month or so ago, right about the time I turned on the gas furnace for the winter season. And where does my furnace sit? About 15 feet away from my grow cabinet.

    So now I have to decide: Do I continue to use RO water, knowing that it sucks up CO2 like a sponge? I would have to continue to add 1.0 to 1.5 ML of PH-Up to the reservoir daily, not knowing how this might impact the plant. Or do I change to tap water, which would hopefully be more PH stable, not knowing what exactly is in the water to start with and having to deal with chlorine / chloramine?
    Are you on city water or well? Please refer to the chart I posted.

    You are experiencing leaching and since it's relatively minimal I would lower the ppm by 100. Monitor the situation if it stabilizes great if not continue to drop ppm by small increments until the problem resloves itself.

    Res changes aren't needed to adjust. simply add some water to dilute the concentration of nutes in your res!
    Viola!

    Hope this get a you going in the correct direction!
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Checked my PH level for two days now. Its still running at 6.2 no change. I guess what I experienced was a fluke.
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Hi guys and girls! Sorry if am hijacking this post I have sort of the same issue as John1961. I use a 5 gallon single dwc bucket for my plant. I have around 2.6 gallon in it when i changed waters two days ago, now am down to 1,84. My PH drop from 6 to 4.1, i use GHE 3 series and i used there recommendation for nuts i know what is high. but i had some issue earlier and one of my plant dies. This is my first grow and since maxed out my second plant is now growing like crazy. my roots are white as peelers so nothing bad.

    I have no issue with adjusting the PH every now and there, but am not sure how i do it? Do i have to really change the bucket. Or can i just add some water or a premix of then nutrients and then just adjust ph with a glass of water and some ph up or down? If i add plain water i just dilute the nuts right?

    thanks or any help.

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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by dooxy View Post
    Hi guys and girls! Sorry if am hijacking this post I have sort of the same issue as John1961. I use a 5 gallon single dwc bucket for my plant. I have around 2.6 gallon in it when i changed waters two days ago, now am down to 1,84. My PH drop from 6 to 4.1, i use GHE 3 series and i used there recommendation for nuts i know what is high. but i had some issue earlier and one of my plant dies. This is my first grow and since maxed out my second plant is now growing like crazy. my roots are white as peelers so nothing bad.

    I have no issue with adjusting the PH every now and there, but am not sure how i do it? Do i have to really change the bucket. Or can i just add some water or a premix of then nutrients and then just adjust ph with a glass of water and some ph up or down? If i add plain water i just dilute the nuts right?

    thanks or any help.
    Ph should flux up not down what was your ppm of solution?
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Don’t forget that water temp effects ph and also my best way to fix this is flush for 24 hours at 5.5 then feed but let water bubble with air stone ph it and have it bubble 24 hours before use and then check ph should rise and re ph and use it should be more stable then you gotta remember that your nutes effect your ph, water temp effect ph so the air pump could be heating it or your nutes aren’t fully mixed then you have your air stone mix them together they bond to make the solution and drop ph is my only quick guesses or under feeding
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    just started i dont have a way to check ppm, but am starting to understand that it is impotent. But regardless can you just add more water with some ph up in in or will that dilute the nutrient? or is the best bet to just water change every time the ph drops?

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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by dooxy View Post
    just started i dont have a way to check ppm, but am starting to understand that it is impotent. But regardless can you just add more water with some ph up in in or will that dilute the nutrient? or is the best bet to just water change every time the ph drops?
    I would top off until res change it’s not good to play the see-saw game with ph up and down to much chemicals in the mix is really bad

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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by bignugz420 View Post
    I would top off until res change it’s not good to play the see-saw game with ph up and down to much chemicals in the mix is really bad
    sorry of am repeating myself but "top it of" is that with just normal water or a mix of the nutrient with water?
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by dooxy View Post
    sorry of am repeating myself but "top it of" is that with just normal water or a mix of the nutrient with water?
    Ph'ed water only.
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    Re: DWC PH issues - Ph dropping like a rock - Please help

    Quote Originally Posted by dooxy View Post
    just started i dont have a way to check ppm, but am starting to understand that it is impotent. But regardless can you just add more water with some ph up in in or will that dilute the nutrient? or is the best bet to just water change every time the ph drops?
    Ppm or EC is very important until you learn each compound you are using I have been with GH PRODUCTS for years and love them so I know there feeding chart very well but in flower I’ll get up to 1200 ppm and veg is half that I suggest you get a meter just for at least run off for after flushing is done that’s how I know she is salt free
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