Assistance needed to reduce Alk/ dkh

Discussion in 'Water Parameters and Additives' started by Floyd, 12 Feb 2013.

  1. Floyd

    Floyd

    Joined:
    10 Dec 2012
    Posts:
    370
    Likes Received:
    3
    Location:
    Polokwane
    Hi,

    I need assistance to reduce my dkh in my Redsea Max. I would like to stabilize parameters in order for me to add coral.

    My current parameters:

    SG: 1.024
    Temp: 25 (chiller connected to control temp)
    PH: 8.0
    Dkh14, alk meq 5.25 (too high)
    CA: 420
    Mag 1280
    Nitrate 25
    Phos 0.5

    Notes:
    I have installed a reactor with bio pellets in the DT a week ago.
    Filtering: carbon bag, Orca cubes with a airstone in the 1 compartment.
    Tank is running for approx 3 months.

    What can I use to reduce Dkh/ Alk?
     
  2. AdS Guest




    to hide all adverts.
  3. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,149
    Likes Received:
    171
    Location:
    Bracken
    Water change with a good salt with close to nsw params. D-D ocean salt, or aquavitro salinity. Even instant ocean or aqua medic will do. Be carefull with seachem reef, as it will chase up your calcium. Which I suppose is what you want... Just not too much too fast.
     
  4. Visser

    Visser MASA Contributor

    Joined:
    21 Nov 2011
    Posts:
    2,670
    Likes Received:
    45
    Location:
    Willows,Pretoria /Brits
    Agree, a couple of large water changes is the best way.
    Oh, & btw, please just make sure your test kit is fine before you make any drastic changes.
    How did your alk get so high?
    An interesting read about the link between calcium & alk is the one by randey farley-holmes... Will see if i can find the link...
    It explains the proportions between cal & alk & the way it should be kept in balance..

    Another method you can try is to slowly increase your calcium to around 450ppm, stop dosing any cal & alk & let your coraline algae use up the extra cal & alk until they drop back into the normal range.
     
    Last edited: 12 Feb 2013
  5. Albert Terego

    Albert Terego

    Joined:
    19 May 2008
    Posts:
    599
    Likes Received:
    6
    Location:
    Randburg, Johannesburg
    I would not stress about it. Stop dosing any alkalinity supplements (if you are) and it will come down naturally with usage by corals/coralline algae and your regular water changes.
     
  6. Floyd

    Floyd Thread Starter

    Joined:
    10 Dec 2012
    Posts:
    370
    Likes Received:
    3
    Location:
    Polokwane
    Reduce dkh/ Alk

    Thanks for all the advice.

    @Irrie Ivan - I will start with WC.

    @Visser - I dosed some reef fusion 2 - that increased the Alk. I stopped with the dosing.
    @Albert Terego - I stopped dosing reef fusion 2.

    If I increase the Calc slightly using reef fusion 1, will this assist with reducing dkh/ Alk or will it remain constant?


    I would like to know when can I place some coral in the tank? Once dkh is between 7-12? or can I place some coral that are more hardy - Zoa's, etc?
     
    Last edited by a moderator: 26 Nov 2015
  7. Albert Terego

    Albert Terego

    Joined:
    19 May 2008
    Posts:
    599
    Likes Received:
    6
    Location:
    Randburg, Johannesburg
    Why were you dosing Reef Fusion 2 when you had no corals in the tank?

    Be patient, the alkalinity will come down naturally when you do water changes. So keep these up.

    As for alk pick a number and try stick to it. I'd suggest a dKH of around 8 - suitable for most mixed reef-type set-ups.
     
  8. Visser

    Visser MASA Contributor

    Joined:
    21 Nov 2011
    Posts:
    2,670
    Likes Received:
    45
    Location:
    Willows,Pretoria /Brits
    Pushing your calcium higher will bring your ratio between cal & alk closer to normal levels & will make it easier for calcifying organisms to absorb the extra alk...
    Will post the link now to help you understand it better.

    Yes, it should be ok to add a few zoas & mushrooms now...
    You should just keep an eye on that high nitrate count.
    How long has the bio-cubes been in your tank?
     
  9. Visser

    Visser MASA Contributor

    Joined:
    21 Nov 2011
    Posts:
    2,670
    Likes Received:
    45
    Location:
    Willows,Pretoria /Brits
    Here is the link. Its a fantastic guide for any reef keeper to understand the relations between calcium, alkalinity & magnesium.
    You might not fully understand everything, but its a good place to start if you want to start keeping calcifying corals...

    http://www.advancedaquarist.com/2002/11/chemistry
     
  10. Floyd

    Floyd Thread Starter

    Joined:
    10 Dec 2012
    Posts:
    370
    Likes Received:
    3
    Location:
    Polokwane
    dkh/ ALk

    I will then dose reef fusion 1.

    I will address the Nitrate through regular water changes.

    The cubes are running for approx two weeks.
     
  11. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,230
    Likes Received:
    228
    Location:
    North Riding, Jozi
  12. Visser

    Visser MASA Contributor

    Joined:
    21 Nov 2011
    Posts:
    2,670
    Likes Received:
    45
    Location:
    Willows,Pretoria /Brits
    Yep, thats some good advice @Albert Terego.
    As with most things in marine keeping, its good practice to stick to a certain known value that has worked well for others... This will give you a guideline where you can work from.
    Also, you should never dose a lot of anything at a time. Its a real recipe for dissaster!
     
    Last edited by a moderator: 26 Nov 2015
  13. Visser

    Visser MASA Contributor

    Joined:
    21 Nov 2011
    Posts:
    2,670
    Likes Received:
    45
    Location:
    Willows,Pretoria /Brits
    Just remember, dose slowly & dont overdose...

    You will start seeing some results from the cubes very shortly. (amazing product BTW)
     
  14. Floyd

    Floyd Thread Starter

    Joined:
    10 Dec 2012
    Posts:
    370
    Likes Received:
    3
    Location:
    Polokwane
    Dkh/Alk

    @Visser thanks for the link.

    I will ensure that there is no drastic reductions or changes.

    I want to get the Dkh to approx 9 or 10 and then stick to it. Will raise the calc and mag slightly (and slowly), to reduce alk. Further to this I will do WC.

    I think it should be sorted in the next two weeks.

    Is there anything else that I should consider?
     
    Last edited by a moderator: 26 Nov 2015
  15. Nemos Janitor

    Nemos Janitor

    Joined:
    7 Feb 2009
    Posts:
    8,384
    Likes Received:
    286
    Location:
    Joe's Mountain
    Always mix your salt mix to the recommended Salinity on the bucket. If your salinity is lower than recommended then you have added less Ca, Mg etc. If it is to high then you have added to much Ca Mg etc This causes many issues.
     
  16. dallasg

    dallasg Moderator MASA Contributor

    Joined:
    14 Dec 2008
    Posts:
    16,769
    Likes Received:
    582
    Location:
    Sandton
    hi

    dont dose fusion 1 either, its a 2 part made to be used together...
    if no corals no need to dose those
     
Recent Posts

Loading...
Similar Threads - Assistance needed reduce Forum Date
Assistance needed on LED unit Anything DIY Related 6 Aug 2014
Identification assistance needed on a GSP Frag... ID Needed 19 Apr 2013
cycle advice and assistance Required. Beginner Discussions 5 Jul 2016
MTN assistance Technology 10 Jun 2015
need assistance mods General Discussions and Advice 15 Feb 2015
UPS backup assistance Power cuts 12 Nov 2014
Wanted/Help/Assistance The Sump 11 Nov 2014