ULNS depletes potasium faster?

Discussion in 'General Discussions and Advice' started by kwazimoto, 3 Sep 2013.

  1. kwazimoto

    kwazimoto

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    my system is running for about 7 years now. I have a ULNS system running ZEO. I can't get my potassium level higher than 320ppm?

    im using a stock solution of 500g potassium chemical powder to 25l of RODI water. I have increased the solution recently to 1kg:25l but still no increase. Dosing 650ml a day on my 400G tank.

    any suggestions.
     
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  3. 459b

    459b Moderator MASA Contributor

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    Check your test kit.
    That's a lot of potassium to be dosing and not seeing a change in levels.
     
  4. kwazimoto

    kwazimoto Thread Starter

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    i have both elos and salifert test kits. i prefer elos. on elos i get 320ppm. on the salifert i get 310ppm. brand new kits expiring 2014. i have never tested K up until now. i don't see that intense blue color of my SPS anymore
     
  5. Express Reef

    Express Reef

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    Post a pic, I need to see this system... not everyday that one see a ZEO system:p
     
    Last edited: 3 Sep 2013
  6. kwazimoto

    kwazimoto Thread Starter

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    Zeo is BIG like the US
     
  7. Express Reef

    Express Reef

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    Where do you buy this potasium you use? how pure is the chemical???

    Can you post pics of your tank please??????
     
    Last edited: 3 Sep 2013
  8. kwazimoto

    kwazimoto Thread Starter

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    although it seems like i'm dosing a lot of K. it is not that concentrated. I have only 83% lab grade. It set me back about $120 for 20kg compared to $260 for 97% lab.
     
  9. kwazimoto

    kwazimoto Thread Starter

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    anyone experienced this on their ULNS?
     
  10. Trasique

    Trasique tahir

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    What skimmer are u using, pinwheel and needle wheel skimmers are known to deplete potassium in specifically ZEO systems.

    I think it's more the combination of all filtration elements combined with pinwheel skimmers.

    Also which potassium supplement are u using?
     
  11. Monti

    Monti

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    ULNS doesnt really deplete potassium faster if you mean does it makes corals consume potassium in a greater ratio than normal... It does makes corals more susceptible to issues from lower potassium.

    Zeolith DOES absorb potassium though
     
    Last edited: 3 Sep 2013
  12. Zuna

    Zuna

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    doesnt potassium promote red and pink colours and iodine blue
     
  13. kwazimoto

    kwazimoto Thread Starter

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    i am running a diablo DCRS 300ext skimmer. It is a dc pinwheel pump with 6 speed setting. i have read that over skimming may be the cause of this, but after running the dc pump on low speed for about 4 months still no change. maybe i should push for 6 or more months?
     
  14. Express Reef

    Express Reef

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    Nope :biggrin:
    Iodine = pink
    Potassium & boron = red
    Strontium = blue/purple
    Iron, Manganese, Cobalt, Aluminum, Zinc, Chrome and Nickel = Green
     
    Last edited: 3 Sep 2013
  15. Trasique

    Trasique tahir

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    As you should know zeovit recommends the use of less aggressive skimmers such as the Beckett, there are also plenty of threads on the zeovit forum regarding this issue.
    I suggest you read a couple of them.
    I'm using brightwell potassium for my depletion because I too have a pin wheel skimmer.
    Although I'm not experiencing anywhere near the rate of depletion you are, it might be because my system is not fully stocked ATM.
     
  16. Monti

    Monti

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    To be fair, many many zeovit reefers do not use Beckett skimmers and dont have this issue.

    Just bear in mind every time do do a stone exchange, potassium binds to the stones. Do this enough times without dosing K, you will have low K issues.
     
  17. Trasique

    Trasique tahir

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    I don't even test potassium, I use a yellow acro as an indicator, because at correct potassium levels they keep their brilliant color.
     
  18. Trasique

    Trasique tahir

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    I do agree, which is why I'm still using my reef octo. Just pointing out the opinion of others.
     
  19. Monti

    Monti

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    A green monti is also a good indicator (if it dulls out your K is low).... but this is by no means a foolproof method. If you run zeo and are dosing potassium you should try to test your K. In fact, anything you dose you should test for.
     
  20. Trasique

    Trasique tahir

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    Also my potassium usage might just be corals consuming instead of depletion.

    Maybe cross check ur levels with a different test kit just to make sure before taking action.
     
  21. JS

    JS

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    I had this issue in my system....I just dose zeovit potasium-iodide-flouride every second day (5drops), and that keeps it stable at 400.
     
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