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Safest food grade diy ph down

Discussion in 'Do It Yourself' started by applepoop1984, Jun 8, 2017.

  1.  
    applepoop1984

    applepoop1984 Well-Known Member

    many posts on here about cheap diy ph down from sulfuric acid... there is a better safer carcinogen free alternative that is superior; phosphoric acid

    sulfuric acid used in other threads, while cheap, has drawbacks:

    1. carcinogenic( 64% of workers exposed to the fumes develop lung cancer)
    2. the source of their acid is from battery acid and not food grade
    3. it is stronger than phosphoric acid, with over 20,000 views countless accidents have more than likely occurred following the other diy guides and countless amounts of inhalation of carcinogenic fumes
    4. food grade is sold in bulk, usually by the tonne to large scale breweries( they use it because its cheap)

    phosphoric acid on the other hand is superior in every way except being a ph of .87 at 85% food grade vs sulfurics .3 ph at 97%:

    1. non carcinogenic
    2. sourced from food grade phosphoric acid
    3. weaker than sulfuric thus much safer to handle
    4. sold readily on amazon for 48$ a gallon or less

    onto the tutorial.

    what you need:

    1. safety glasses
    2. rubber gloves
    3. measuring glass at least 32 oz
    4. 1 gallon food grade phosphoric acid
    https://www.amazon.com/Gallon-Grade...id=1496911965&sr=8-9&keywords=acid+food+grade
    5. 4 1 gallon containers of distilled water
    6. dust mask
    first put on gloves and glasses, open all 4 gallons of distilled water

    pour out 32 oz into measuring glass from each bottle, discarding or saving for later

    pour 32 oz of phosphoric acid into DRY measuring glass and then pour 32 oz into each gallon jug of water( we pour acid into water because acid will react violently if we do the opposite)

    this makes each gallon contain 21% phosphoric acid, gh ph down has a concentration of 10-30% phosophoric acid putting each gallon of solution right in the middle of their "trade secret" concentration

    compare the gh gallon of ph down: $26
    https://www.amazon.com/General-Hydr...rd_wg=7bywh&psc=1&refRID=A5JJYA2KHDJGGAWWJD87

    $26x 4= $104

    by buying the phosphoric acid at 85% you save ~ $56 minus the cost of water

    all in all a safer, non carcinogenic alternative the non food grade sulfuric acid tutorials on here
     
    Last edited: Jun 8, 2017
    Lightgreen2k and Bakersfield like this.
  2.  
    chemphlegm

    chemphlegm Well-Known Member

    I saw that on google last century in the 90's, whats your point here?
     
    churchhaze likes this.
  3.  
    ANC

    ANC Well-Known Member

    CO2
     
  4.  
    applepoop1984

    applepoop1984 Well-Known Member

    the top diy ph downs in this forum have not even considered a much safer alternative. if you're asking why post this on riu, why reply to my post if you can use google instead?
     
  5.  
    applepoop1984

    applepoop1984 Well-Known Member

    what?
     
  6.  
    ANC

    ANC Well-Known Member

    pH controllers are common in the aquarium trade. They drive down pH by adding CO2
     
    indianajones likes this.
  7.  
    applepoop1984

    applepoop1984 Well-Known Member

    No adding co2 deprives the roots of oxygen, you want co2 in your air not your water
     
  8.  
    ANC

    ANC Well-Known Member

    It is not mutually exclusive, you can have both high oxygen and CO2 in water.
     
    Dumme likes this.
  9.  
    applepoop1984

    applepoop1984 Well-Known Member

    Would love to see your write up on using co2 for pH control. Why no comments in the other diy pH down threads?
     
    Last edited: Jun 8, 2017
  10.  
    applepoop1984

    applepoop1984 Well-Known Member

    Update: 5 gallons of food grade 85% phosphoric acid can be had for less than $100

    http://www.mbferts.com/Phosphoric-Acid-85-Food-Grade-Fertilizer-Hydro-DIY-pH-Down-260.htm

    That's less than $20 per gallon undiluted. To reach the median 21% phosphoric acid each gallon will give the equivalent of 4 gallons of General Hydroponics pH Down which costs upwards of $30. The cost of one gallon of phosphoric acid diluted to the strength of the General Hydroponics pH Down is $4.95 per gallon
     
  11.  
    Enigma

    Enigma Well-Known Member

    This is an excerpt from an article written by The Center for Agriculture, Food and the Environment:

    "In our experience, the most effective and widely used acid is sulfuric acid; however, this is one of the most hazardous acids to use. For low amounts of alkalinity removal, phosphoric acid may be the acid of choice. However, we do not advocate adding more than 2.25 fluid ounces of this acid to 100 gallons of water, because of the amount of P one would add. Nitric acid is theoretically ideal because it adds nitrate nitrogen; but it fumes and is highly oxidizing, making it very difficult to handle. Citric acid is a weak organic acid and a solid, making it safer than the other three; but it is much less effective, and therefore more expensive to use."

    Simply copied and pasted with no adulteration.

    I do not appreciate anyone spreading misinformation on this site as I take a personal stock in the information provided here. I've noticed, over many years and several boards, there are people that logon to make a name for them self, show-off, to stroke their ego with delusions of grandeur. Some pull their information from magazines, others rely on their buddy's expertise or what ever sales pitch the local hydroponics store sales clerk swears by.

    DO NOT BE FOOLED BY GIMMICKS!

    Simply, the cheapest and easiest way to pH down is sulfuric acid, it was $8 last I bought some and I never used it all.
     
    Last edited: Jun 9, 2017
  12.  
    applepoop1984

    applepoop1984 Well-Known Member

    http://gh.growgh.com/docs/MSDS/pHDownLiquid_MSDS.pdf
     
  13.  
    Enigma

    Enigma Well-Known Member

    General Hydroponics marketing sheet?

    Don't be fooled.
     
  14.  
    applepoop1984

    applepoop1984 Well-Known Member

    Material safety data sheet
     
  15.  
    Enigma

    Enigma Well-Known Member

    From the marketing data sheet you posted:

    "Phosphoric acid
    Ammonium dihydrogenorthophosphate
    Citric acid"

    "DANGER!

    CAUSES RESPIRATORY TRACT, EYE AND SKIN BURNS. MAY BE HARMFUL IF SWALLOWED. CONTAINS MATERIAL THAT MAY CAUSE TARGET ORGAN DAMAGE, BASED ON ANIMAL DATA.

    Do not breathe vapor or mist. Do not ingest. Use only with adequate ventilation. Do not get in eyes. Do not get on skin. Do not eat, drink or smoke when using this product. Keep container tightly closed. Wash thoroughly after handling."


    That product sounds scary!
     
  16.  
    applepoop1984

    applepoop1984 Well-Known Member

    The material safety data sheet for battery acid reads the same Plus is listed as a carcinogen
     
  17.  
    Enigma

    Enigma Well-Known Member

    Yet, it is more commonly used in agriculture than what you are recommending. It is also far less expensive than your recommendation. A professional opinion would be that sulfuric acid is a far better choice than phosphoric acid.
     
  18.  
    Dr.Nick Riviera

    Dr.Nick Riviera Well-Known Member

    lol, nice sig!!!!
     
    Bakersfield likes this.
  19.  
    applepoop1984

    applepoop1984 Well-Known Member

    For commercial agriculture.
     
  20.  
    Enigma

    Enigma Well-Known Member

    Agriculture, stay with me here.
     

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