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Featured Low Magnesium

Discussion in 'Help and Advice' started by damo666, Sep 15, 2017.

  1. damo666

    damo666 Registered

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    My mg has been low for a while and despite dosing seachem reef advantage mag weekly, now double the dose that should raise my level, I can't raise it above 1150. So what to do? Because apart from the impact on my tank, and the frustration, it's getting costly. To my eyes nothing seems to be suffering, and even tho my calcium is also low at 350, corals and coraline algae seem to be doing fine. Ph is 8, Alk is 9.5.
     
  2. doug_amanda

    doug_amanda Moderator Staff Member

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    How much are you dosing per week?
    I assume Seachem is a liquid additive, what level are you aiming for?
     
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  3. cuprajake

    cuprajake Registered

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    dont use seachem its too dear.

    you can get magnesium salts off ebay. you mix up and add.

    mag is important. cal needs to come up too

    what salt do you use,


    Look at this on eBay http://www.ebay.co.uk/itm/232466302071

    this is much more effective, and chesper too.

    you can buy calcium powder too.

    what test kit do you use for mag?
     
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  4. damo666

    damo666 Registered

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    Hi guys.....
    Seachem is a granular additive, I'm dosing 8 teaspoons per week. 1450 would be good.
    Using a salifert kit, all mine are that brand.
    I use Tmc salt
     
  5. cuprajake

    cuprajake Registered

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    good kits then.

    what coral do you have? if you cant raise it.

    have you tested the mag in your fresh sw to see if its low, as a wc with low mag could be un doing your dosing.
     
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  6. damo666

    damo666 Registered

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    The salt checked out at 1350, lower than I thought it would be. Corals.....various button polyps, probably totalling 100 or so. Different types of xenia, duncans, leathers, Kenya trees (keep on drooping) Overall I'd say 20 corals.
     
  7. PaulTys

    PaulTys Registered

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    If it's soft corals I wouldn't worry about you mag or cal levels as they are to be honest.
     
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  8. shady

    shady Moderator Staff Member

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    Although salifert do the job ( IMHO ) is the test kit in date ?? I take it you've re-tested ??

    How long has the tank been set up - new tanks tend to suck up magnesium like a sponge whilst it settles ??
     
  9. damo666

    damo666 Registered

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    Tanks been set up since Jan, upgraded 4 weeks ago, basically everything moved across plus extra sw. Test kit is in date for June 19. Took it to my mate in lfs who checked it against his, same reading.
    Done more tests than I care to mention lol.
     

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  10. shady

    shady Moderator Staff Member

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    If you've upgraded did you add new sand ??
     
  11. damo666

    damo666 Registered

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    Nope, same sand moved over. That said, had the same thing prior to upgrade.
     
  12. shady

    shady Moderator Staff Member

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    That's my theory blown out the water then ( normally newly set up tanks / rock and sand use up a lot of magnesium whilst they settle )

    In your case I would buy a powdered magnesium and dose quite heavily until you reach your desired point ( 1350 - 1500 ) whist not increasing daily by more than 10 - once the mag is correct double check the rest of your test
     
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  13. Mr Dave

    Mr Dave Registered

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    Just be aware that raising your Mg may throw your Ca and Kh out as they are stabilised by Mg
     
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  14. damo666

    damo666 Registered

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    Thanks Alpine, I'll bear that in mind and monitor them as I try to raise it.
     
  15. Mr Dave

    Mr Dave Registered

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    dose in this order pal
    Ca
    Mg
    Alk
     
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  16. doug_amanda

    doug_amanda Moderator Staff Member

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    I would dose mg first, what sg are you running at ?
     
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  17. damo666

    damo666 Registered

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    Hi doug_amanda. My specific gravity stays at 1.024-5, more stable now I've added a TMC infrared auto top up. I took cuprajakes advice and ordered the mg crystals from eBay. It took 500mg over 7 days to bring it up to 1430
     
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