Importance of Potassium

Discussion in 'Water Parameters and Additives' started by Mekaeel, 15 Apr 2009.

  1. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Guys, I've put this little article together, hope it helps.

    We constantly monitor our water parameters, especially the main ones eg. Ca, MG and Alk. However many of us including me (Until recently) do not test or even dose Potassium (K+) in our systems. Potassium is a very important yet overlooked water parameter espescially in SPS tanks.

    Potassium levels found in NSW ranges from 380-400, with 380 being ideal. Therefore these are the levels that we should aim for in our little glass boxes. Potassium is found in salt mixes and ofcoarse NSW that we use, however due to heavy skimming, Potassium is removed and therefore requires Potassium supplements to elevate and keep the above mentioned levels constant. There are numerous companies that stock Potassium eg. Korallen-Zucht.

    Some of the side effects of low K+ in a system include, slower growth on corals, tissue necrossis, pale colours and at times, no growth at all. We then ponder why most of the international tanks look so much more colourful as compared to ours.

    So to conclude, obtain a K+ test kit and monitor your levels and you will be surprised with the results!

    Mekaeel
     
    Last edited: 15 Apr 2009
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  3. Tony

    Tony

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    What forms of potassium are good. I use potassium permangeanate in my tank to reduce DOC's. Is that good enough
     
  4. dallasg

    dallasg Moderator MASA Contributor

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    interesting, will be following
     
  5. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Tony, I've recently started dosing KZ Potassium and previously Potassium Iodide.
     
  6. dallasg

    dallasg Moderator MASA Contributor

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    surely the potassium Iodide is a good idea, wont it break down to iodine as well?
    are u mixing and adding to RO?
     
  7. Tony

    Tony

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    Does it have any effect on the colour of SPS's especially reds
     
  8. Tony

    Tony

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    I'm sure it will Dallas. Most chemical reactions will leave an orphan behind that's why we worry about chloride imbalances when dosing calcium chloride. The calcium is taken up by the corals leaving the chloride behind
     
  9. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Yes it does. Especially on Montipora's.
     
  10. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Yes it will Dallas. No I dont mix. When dosing using KZ Potassium Iodide Flouride, it is 1 drop per 25 gallons.
     
  11. dallasg

    dallasg Moderator MASA Contributor

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    Mek, thanks this is something i will read up about further, which test kit are u using?
     
  12. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Im currently not using any test kit, that is why I have cut my dosage down to half the recommended. I will be ordering Zeobac and Zeofood7 soon, so I will get myself one with this order.
     
  13. dallasg

    dallasg Moderator MASA Contributor

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    cool, i see on google there are a few references to potassium etc will add the good links
     
  14. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Excellent, thank you Dallas.
     
  15. Midasblenny

    Midasblenny

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    Many additives contain potassium as an ingredient, the most common probably being in Iodine supplements as Potassium Iodide but also in buffers like Pure Reef which has a large percentage of Potassium Carbonate.
     
  16. keyaam

    keyaam

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    a quote from tank of the year 2008

    "I do a 120l water change after the system has used around 120l of RO water, which normally occurs around every 2 weeks or so.

    My preference is to use synthetic salt, instead of natural seawater, and I don’t care about brand names at all, as long as the potassium is within recommended levels. I like to control (or have control over) the water I replace. I find levels within the local natural sea water a little out of control…"

    here is the link
     
  17. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Awsome Robin. Tell me, is there enough Potassium in the Iodine supplements and buffers to keep K+ at optimal levels, or would you say that a Potassium supplement will still be required?
     
  18. Midasblenny

    Midasblenny

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    I doubt whether an extra potassium additive is necessary but additional research needs to be done to establish the supply and demands of K+ in a reef tank. Tons of variables like types of livestock kept, type/efficiency of the skimmer etc have not been conclusive. Chemically speaking potassium is fairly simple to test for using instrumentation but i`m unaware whether a rapid or colourmetric test for testing in water is available?
     
  19. Mekaeel

    Mekaeel Thread Starter Moderator MASA Contributor

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    Mmhhh interesting. I've seen the way K+ levels drop in SPS tanks on overseas forums. Alot of focus has been on K+ especially on Zeo tanks. I would guess because of heavy skimming and the bioload in these tanks.
     
  20. Mike

    Mike Retired Moderator

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    To keep up your potasium levels, simply eat a banana a day;)
     
  21. Shaun

    Shaun Retired Moderator

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    :lol::lol:
     
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