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Thread: Low alk, high calc?

  1. #1
    Join Date
    02-06-2010
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    Default Low alk, high calc?

    I've been testing my calcium and alkalinity and dosing 2 part some. My calcium is really high <500PPM but my alk is pretty low. Should I just dose part one of the the 2 part to get it up? I've also been dosing magnesium some but that's really high too.
    Master Reef Curmudgeon

  2. #2
    Join Date
    05-02-2007
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    Live Oak
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    Default

    I want to tag along as cal has been about 500 for sometime now. Although my alk is also pretty high. I cant comment on Mag as I dont have a test kit.
    Kevin- 375 Gallon Reef

    Reefing made easy...

  3. #3

    Default

    Stop dosing the Ca and Mg until the levels return to a level you desire.

    Baking soda is the main ingredient in the Alk portion of the 2 part. Dose a little bit at a time or bake a box of baking soda in a glass or ceramic oven safe dish.

    http://home.comcast.net/~jdieck1/chemcalc.html

    http://reefkeeping.com/issues/2006-02/rhf/index.php
    http://reefkeeping.com/issues/2006-02/rhf/index.php

  4. #4
    Join Date
    02-06-2010
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    Default

    Yeah, I've stopped dosing all together for the time being since calc and mag are high. I was just wanting to get my alk up so I guess I'll slowly dose part 1 until I get that up. I'll also keep an eye on my pH. Thanks!
    Master Reef Curmudgeon

  5. #5
    Join Date
    02-07-2010
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    Sugar Land, TX
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    Default

    get a buffer at lfs. Just make sure to not put too much in and monitor alk until desired alk level achieved (8-12) and stop using mag and calc supplements return to normal. Heres an article about alk and calc relationship.

    http://www.advancedaquarist.com/issues/nov2002/chem.htm

    that should explain everything you need to know about maintaining your alk and calc lvls. Good Luck.
    John
    90 Gallon Reef Tank

  6. #6
    Join Date
    08-22-2007
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    NE san antonio
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    Default

    What is your alk and mag at? sometimes high and low to you may be within a normal range.
    Reefing is just like cooking, all the ingredients have to be just right , except you don't have to bring the water to a BOIL...

  7. #7
    Join Date
    02-06-2010
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    Default

    My alk is around 7. I can't remember what my mag was at but I know it was slightly higher than what my test kit recommended. I'll check it again in a couple days and let you know.
    Master Reef Curmudgeon

  8. #8
    Join Date
    03-04-2005
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    NE San Antonio
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    11,696

    Default

    you may also want to get a second opinion on the alk level - test kits have been known to go bad.
    Ace
    The Shade Tree Craftsman



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