Cannot raise my dKH (TA)

Discussion in 'Water Parameters and Additives' started by Sammy, 20 Apr 2011.

  1. Sammy

    Sammy

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    Hi Guys,

    Need your help here, already did loads of reading and understanding chemistry and relationships between pH,Alk and Ca.

    My Alk seems to be around 6-7dKH, been dosing everyday for the past 5 days with about 2-3tsp of Seachem Reef Builder to raise this but to no avail.

    Other Parameters:

    Tank vol, 300L
    pH 8.2 (difficult to see exact with sera test kit)
    Ca - 400 ppm
    Mg - Not tested this but hope it should be ok, as the Reef Builder also adds Mg

    Any ideas will be appreciated and don't want to overdose :-(

    Thinking of starting to go with Baking Soda (Koek soda) which I acquired the weekend

    Sammy
     
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  3. mariusmeyer

    mariusmeyer

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    Something is no right since 3 tsp of reef builder should increase you dKH by 2. So unless you have a lot of hard corals I reckon something is wrong. What test kit are you using to test the dKH?
     
  4. Sammy

    Sammy Thread Starter

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    Hi, I'm using the sera kit, also no hard corals at the moment, just a few softies ?
     
  5. mariusmeyer

    mariusmeyer

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    Then my suggestion is to get hold of a Salifert kit (Sorry but Sera is crap when it comes to tests) before you dose any more.

    Test and go from there.
     
  6. Sammy

    Sammy Thread Starter

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    thanks dude ! I will try that and see, also kit is about 1 year old but not expired though ?
     
  7. Sammy

    Sammy Thread Starter

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    now I'm nervous, keen to see what the new kit says, maybe dKH = 100 with all the dosing :-(
     
  8. mariusmeyer

    mariusmeyer

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    Could be very high. It might be too high compared to normal but if the corals are ok then just let it come back down on its own.
     
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  9. Sammy

    Sammy Thread Starter

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    will test tonight and lets see what the new kit says
     
  10. Sammy

    Sammy Thread Starter

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    Tested with the Salifert kit, and ohhh my word how so much better and so much more resolution, with this kit my dKH is 12.5, lower than I thought after all the dosing.


    Also bought the Mg test kit and measured 1350 ppm

    So all in check, Marius thanks for the tip on the kit !
     
  11. Tony

    Tony

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    Just let your KH drop a bit. Your magnesium is fine
     
  12. mariusmeyer

    mariusmeyer

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    Cool. Glad you are sorted now. Take another test around 48hours after the first one to determine the daily drop in dKH. Then you can work out how much to dose per day to keep it stable.
     
  13. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Hi Sammy, try and keep you Alk between 6.5-8.5 DKH (NSW levels) and your Ca 380-420. As Tony mentioned, Let your Kh fall to these levels that I have mentioned and maintain it there.
     
  14. Martinf

    Martinf

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    I've tried raising my Alk with Seachem reef builder but no luck there. I have tried Brightwell Alkalinity 8.3 since Friday also with no change. Its sitting at 5 dKh. I've got 2 Red Sea Test kits and they both giving me the same reading. I have only got a torch coral and leather coral. My Calcium is at 375 and Magnesium at 1280. I have been dosing Red Seas ABC + but have run out that's why they a little low.

    What should I do ?
     
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