Tested potassium today to find it down at 320

Discussion in 'Reef Chemistry by Randy Holmes-Farley' started by rock_lobster, Jan 1, 2018.

  1. rock_lobster

    rock_lobster Valuable Member R2R Supporter

    Joined:
    Nov 26, 2009
    Messages:
    1,557
    Likes Received:
    667
    Location:
    texas
    yep thats exactly right! and my salinity stays in check from sharing frags and toping off mostly with RODI(occasionally adding a little reefcrystals). So I am losing all those elements over time except NaCL. Im dosing 3dkh per day into my tank according to BRS carbonate calculator.
     
    Last edited: Jan 2, 2018

  2. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    30,797
    Likes Received:
    18,378
    Location:
    Arlington, Massachusetts, United States
    OK, so the potassium decline might be from that alone. :)
     
  3. rock_lobster

    rock_lobster Valuable Member R2R Supporter

    Joined:
    Nov 26, 2009
    Messages:
    1,557
    Likes Received:
    667
    Location:
    texas
    Yes I expect so. Maybe not much from utilization at all. Judging by how much I am losing I assume the other trace minerals are probably pretty well depleted but I have never had any ill effects the only thing is from potassium, I notice I start to lose color in my sps. Only other thing I test and dose is iodine.
     
  4. Mattrg02

    Mattrg02 Valuable Member

    Joined:
    Jun 20, 2015
    Messages:
    1,602
    Likes Received:
    964
    Anyone tried using potassium metal? :)
     
  5. rock_lobster

    rock_lobster Valuable Member R2R Supporter

    Joined:
    Nov 26, 2009
    Messages:
    1,557
    Likes Received:
    667
    Location:
    texas
    Potassium? Or KOH. I already dose NaOH as well so I’m sure you could use KOH if you calculated it appropriately.
     
  6. Mattrg02

    Mattrg02 Valuable Member

    Joined:
    Jun 20, 2015
    Messages:
    1,602
    Likes Received:
    964
    No, potassium metal. Ought to give you the biggest bang for you buck. Biggest bang anyways. :)
     
  7. rock_lobster

    rock_lobster Valuable Member R2R Supporter

    Joined:
    Nov 26, 2009
    Messages:
    1,557
    Likes Received:
    667
    Location:
    texas
    Cost wise? It’s hardly worth bothering. 5$ Of KCl will last about 10 years.
     
  8. Mattrg02

    Mattrg02 Valuable Member

    Joined:
    Jun 20, 2015
    Messages:
    1,602
    Likes Received:
    964
    Yeah, but pure potassium metal straight into your tank makes dosing much more,
    Interesting.
     
  9. rock_lobster

    rock_lobster Valuable Member R2R Supporter

    Joined:
    Nov 26, 2009
    Messages:
    1,557
    Likes Received:
    667
    Location:
    texas
    aha my girlfriend may be more interested in trying that experiment lol
     
  10. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    30,797
    Likes Received:
    18,378
    Location:
    Arlington, Massachusetts, United States
    To start fires? :D

    It burns in contact with water.

    If you were a pyro, beware it also boosts pH and alk after burning off the hydrogen gas. :D

    2 K + 2  H2O → 2 KOH + H2 → 2K+ + 2OH- + H2
     
  11. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    30,797
    Likes Received:
    18,378
    Location:
    Arlington, Massachusetts, United States
    That's certainly true. Think Hindenberg. :D
     
  12. joeyhatch11

    joeyhatch11 Well-Known Member

    Joined:
    Jan 8, 2013
    Messages:
    719
    Likes Received:
    132
    Location:
    Burlington,NJ
    What is the ratio of Potassium Chloride to be mixed with 16oz of rodi to dose a tank? Looking at roughly 180g total volume.
     
  13. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    30,797
    Likes Received:
    18,378
    Location:
    Arlington, Massachusetts, United States
    You can mix it at almost any ratio you want. It is very soluble. The solubility limit is around 200-300 grams per liter, depending on temp.

    Obviously, if you dissolve more, you dose less. So it depends on what volumes you want to deal with, and what potassium rise you are looking for.

    1 gram of KCl (containing 525 mg of potassium) will boost your tank by about 0.77 ppm potassium.
     
    joeyhatch11 likes this.
Draft saved Draft deleted

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice
Loading...