High MG and CA Low kh

Discussion in 'General Discussions and Advice' started by Electrician24, 12 Mar 2012.

  1. Electrician24

    Electrician24

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    Water changes and ? to drop MG, CA and raise KH
    Everything in the tank looks happy, even the algi. (That's the problem)
    MG 1800
    CA 5.1dkh
    KH 430
     
    Last edited: 12 Mar 2012
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  3. Albert Terego

    Albert Terego

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    Maybe just leave it (just do your regular water changes) and dose alkalinity buffer only as required.

    Why are the levels so high?
     
  4. mandarinman

    mandarinman

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    Well that level of magnesium will kill the algae! What is your salinity!? Your salinity will be quite high to get that calcium level. Use thin siphon and siphon tank water out and at the same time replace water with ro mixed with kh buffer or 50 /50 mix of bicarb and bicarb that has been baked in oven at 200 for an hour. Just a teaspoon of mix per litre. drip it in otherwise it will cause a snow storm. after that just top up with ro with a bit of kh mix in. just remember no major hurry. major hurry causes shock and vrek vrek vrek
     
  5. mandarinman

    mandarinman

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    Ps you can reduce your sg to 1.022 without any probs
     
  6. mariusmeyer

    mariusmeyer

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    I would not be worried about mg being that high. It will come down by itself if you dont dose any mg supplements. Alk is very low and should be up around 7.5. Ca of 430 is also nothing to worry about. Normal range is around 420 in anyway.

    What supplements are you dosing at the moment? I would get an alk specific supplement such as reef code B or something similar and dose that so that you raise the alk by say 0.5dkh per day. But add it slowly or in batched. Say 1/3rd in the morning, another 1/3rd when you get get in the afternoon and another 1/3rd before you go to bed.
     
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  7. mandarinman

    mandarinman

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    with the calcium being so high you will struggle to bring kh up. Calcium needs to be reduced and then brought up again if necessary at same time and kh supp needs to be diluted in ro before dosing to prevent calcium carbonate snowstorm forming when dosing it.
     
    Last edited: 12 Mar 2012
  8. mandarinman

    mandarinman

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    Last edited: 12 Mar 2012
  9. OP
    Electrician24

    Electrician24

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    Thanx

    Not dosing anything, tried dripping bicarb twice with no results.

    Do not know why
     
  10. OP
    Electrician24

    Electrician24

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    Salinity 1.032
     
  11. mandarinman

    mandarinman

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    Cool ! U can pull calcium and mag down using method i mentioned above and only bring sg down to1.025!
     
  12. mandarinman

    mandarinman

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    Cool ! U can pull calcium and mag down using method i mentioned above and only bring sg down to1.025!
     
  13. OP
    Electrician24

    Electrician24

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    Will do it now and test kh tomorrow.
    Thanx
     
  14. mandarinman

    mandarinman

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    Cool.
     
  15. OP
    Electrician24

    Electrician24

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    OK got the salinity to 1.025 how long should I wait to before I test KH?
     
  16. mandarinman

    mandarinman

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    Did u dose kh in ro?
     
  17. mandarinman

    mandarinman

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    Whoosh u did that in a hurry!
     
  18. OP
    Electrician24

    Electrician24

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    No Bicarb left will buy tomorrow, Ish an hour to bake the bicarb?
     
  19. LuckyFish

    LuckyFish

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    No Anton, 30 minutes at 200 degrees will do to get rid of the hydrogen.;)
     
  20. OP
    Electrician24

    Electrician24

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    Thanx @LuckyFish
     
    Last edited by a moderator: 26 Nov 2015
  21. mandarinman

    mandarinman

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    I was hoping that you would adjust kh up in the ro water. ro tends to have a low ph so on its own ot will pull kh down even further.
     

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