Magnesium supplement dosage

Discussion in 'General Discussions and Advice' started by ziguri, 27 Sep 2014.

  1. ziguri

    ziguri

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
    Recently, i've discovered that there is a magnesium deficiency in my tank. My LFS recommended Aquavitro Ions, which i have been adding daily at the maximum recommended dose, however Ive seen minimal increases in magnesium levels, if any.

    I have been been dosing around 140ml daily at once (500 liter tank). After the first dosage, magnesium level was raised to a level between 1110 and 1140ppm. 2 and a half doses later it is still between 1110 and 1140.

    So, my question is: Is there a way i can maximize the effectiveness of the doses, perhaps do several smaller doses throughout the day etc. ? Also, is there possibly any particular reason why it is being raised so slowly (perhaps some other water parameters not in order?) Any input or recommendations are welcome.

    Recent parameters:
    PH 8.3
    Ammonia 0
    Nitrate 25
    Nitrite 0
    KH 8.0
    Phosphate 0-0.3
    Salinity 1.023
     
    Last edited: 27 Sep 2014
  2. AdS Guest




    to hide all adverts.
  3. Dian6430

    Dian6430

    Joined:
    22 May 2013
    Posts:
    1,386
    Likes Received:
    34
    Location:
    Tsitsikamma EC
    Raise your salinity
     
  4. ziguri

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
    1.025 or higher?
     
  5. Dian6430

    Dian6430

    Joined:
    22 May 2013
    Posts:
    1,386
    Likes Received:
    34
    Location:
    Tsitsikamma EC
    1.026
     
    ziguri likes this.
  6. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,230
    Likes Received:
    228
    Location:
    North Riding, Jozi
    The primary benefit of Mg is that it allows calcium and bicarbonate levels in the water to exist at supersaturated levels. In laymen's terms, having high Mg allows you to maintain higher Ca/Alk.
    Check your Alk/Ca as well, they are most likely low too. Adjust Mg first before you adjust calcium and Alk.

    Don't increase Mg by more than 100ppm per day.
     
  7. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,230
    Likes Received:
    228
    Location:
    North Riding, Jozi
    Oh, when adjusting Ca and Alk, make sure they are in equal parts. Seachem's Reefusion 1 and 2 is a great way to do this.
     
  8. carlosdeandrade

    carlosdeandrade

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

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
    Thanks, will adjust salinity today and then get Reef Fusion 1&2 during the week, once Mg has been raised to a more acceptable level. Any other tips / advice?
     
  10. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,230
    Likes Received:
    228
    Location:
    North Riding, Jozi
    Mg is a very stable in a system, once at an acceptable level, you can test onece a month. Keep in the 1350 to 1450ppm range and you will be fine. Ca and Alk are the hard work, but once you work out what you need to dose, it's just a weekly test. Just keep the Ca and Alk balanced, if one is off, the other is likely to be off as well.
     
    ziguri likes this.
  11. ziguri

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
    Anyone with any experience using Epsom salts to increase magnesium?
     
  12. ziguri

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle

    The supplement i am using says it will increase Mg by 25ppm per day.. that is if i use the maximum dose as per the instructions on the bottle. Do you think i could up the dose to 3x or 4x this maximum dose to achieve my goal Mg level quicker, or should i stick to the manufacturers instructons?
     
    Last edited: 27 Sep 2014
  13. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
    That must be costing you a whack? In all honesty I would use Epsom Salts to initially ramp up your MG by about 200 points to where you want it (done over a few days, not all at once), then you can use the Aquavitro to maintain it at that level.

    If you're doubting the readings then double check that your test kit is not expired, perhaps get someone else or an LFS to check your MG with a different test kit just so you know yours is reading correctly.
     
  14. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
  15. ziguri

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
    Thanks, i just gave Epsom Salts a go. I used around 200g, which is less than half of what the reef chemistry calculator recommends to increase Mg by 100pm. Better safe than sorry. Will test Mg again in an hour or two.
     
  16. dallasg

    dallasg Moderator MASA Contributor

    Joined:
    14 Dec 2008
    Posts:
    16,769
    Likes Received:
    582
    Location:
    Sandton
    Don't raise mg more than 10ppm per day, also using to much Epsom salts can add sulphur, I am sure there is a thread in hennies corner saying one should use Epsom salts and magnesium chloride together
     
  17. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
    Why do you say that? As far as I know Mg can be safely increased by 50ppm per day.
     
  18. dallasg

    dallasg Moderator MASA Contributor

    Joined:
    14 Dec 2008
    Posts:
    16,769
    Likes Received:
    582
    Location:
    Sandton
  19. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,230
    Likes Received:
    228
    Location:
    North Riding, Jozi
    100ppm, according to Bertoni on reefcentral and Randy Holmes-Farley says that 15ppm wont make a noticeable difference.

    In the end it all depends how much water volume you have.
     
  20. ziguri

    ziguri Thread Starter

    Joined:
    9 Sep 2014
    Posts:
    204
    Likes Received:
    3
    Location:
    Vaal Triangle
  21. Bristlebasher

    Bristlebasher

    Joined:
    8 May 2007
    Posts:
    209
    Likes Received:
    2
    A cautionary note here:

    Remember that all of the elements in sea water should be in balance.

    An analogy heard often compares seawater to a plate full of marbles. Plate can only hold 100 . If you add 1 more , another must fall out of the plate to make space for the one added.

    Manipulate Ca , Alk and Mg beyond natural parameters at your own peril.
     
Recent Posts

Loading...
Similar Threads - Magnesium supplement dosage Forum Date
best calcium and magnesium supplements General Discussions and Advice 22 Jun 2012
Epsom salts / Magnesium General Discussions and Advice 25 Oct 2015
[wtd] Tech M Magnesium Wanted 9 Oct 2015
Water parameters - calcium, magnesium and alkalinity Beginner Discussions 13 Aug 2015
Magnesium General Discussions and Advice 23 Jun 2015
Thinking about buying Salifert Test Kit Magnesium? Read our latest review of the... JungleAquatics.NET BLOG 26 Apr 2015
Thinking about buying Seachem Reef Advantage Magnesium? Read our latest review o... JungleAquatics.NET BLOG 4 Apr 2015