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Total Hardnes- explenation please!!

Discussion in 'Advanced Strategies and Fertilization' started by ibanezfrelon, Apr 5, 2011.

  1. ibanezfrelon

    ibanezfrelon Guru Class Expert

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    Some Amano's tanks specifications say that TH is 20mg-lit, what would that mean?
    Can someone explain what TH actualy is? I have found some informations on the web but if someone could explain it to me like i'm a four year old i'd be grateful;)
    Can we assume what GH or KH is from TH?
    Can we transfer the TH from ppm to german degree?

    Thanx!
     
  2. Htomassini

    Htomassini Guest

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    To convert from mg/l multiply by .28 to get dkh.



    Henry t
    Sent from my iPhone using Tapatalk
     
  3. Cyclesafe

    Cyclesafe Guru Class Expert

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    Confusing for sure.

    My guess is that TH is the same as GH and mg-lit should be mg/liter or ppm. GH is found by dividing ppm by 17.848. In my mind, GH is general hardness. I am confused about how to get German hardness (because it might be the same thing).
     
  4. Biollante

    Biollante Lifetime Charter Member
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    Total (Permanent) Hardness

    Hi Luka, All,

    As I understand it, there are two types of hardness temporary hardness is generally due to the bicarbonate ion HCO3-, the hardness can be removed by heating to drive off the CO2. :eek:

    Total hardness is permanent hardness and is the total of Calcium and magnesium cations Ca2+ and Mg2+. Actually, also Fe3+, Sr2+, Zn2+, Mn2 and some others I cannot think of off-hand.:gw

    Titrating with EDTA is the standard method of determining total hardness.:)

    Cyclesafes guess is essentially correct GH general hardness is the same as total (permanent hardness). :rolleyes:

    KH carbonate hardness is “temporary hardness.”:rolleyes:

    Terminology gets in our way, I think.:)

    Biollante
     
  5. detlef

    detlef Subscriber

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    Hi all,

    when ADA details TH specifics they mean total hardness (which mostly consists of Ca and Mg ions). Do NOT read TH as temporary hardness.

    Regards, Detlef
     
  6. Gerryd

    Gerryd Plant Guru Team
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    Hi all,

    German hardness is simply a UNIT OF MEASURE. Degrees of hardness vs ppm of hardness.... That is all. It is not a CATEGORY of hardness like 'carbonate' or 'total' hardness.

    Does that help?
     
  7. ibanezfrelon

    ibanezfrelon Guru Class Expert

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    Thanx a lot guys fot clearing this out foor me.:eek:
     
  8. Cyclesafe

    Cyclesafe Guru Class Expert

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    Molim. Bez problema.
     
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