Correct dosage of epsom salt to combat bryopsis?

Discussion in 'Water Parameters and Additives' started by gaboon, 12 Oct 2010.

  1. gaboon

    gaboon

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    My Mg is currently sitting at 1300 and need to up it to 1500-1600 to tackle a little bryopsis, what is the correct and safe dosage? Tank is roughly 600L. (calcium reactor keeps Mg stable at 1300). Thanks:)
     
  2. AdS Guest




    to hide all adverts.
  3. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,991
    Likes Received:
    782
    You can increase it by 100ppm per day without any ill effects, please also monitor and ensure your calcium and alkalinity levels are in the correct range both before and after dosing the magnesium.

    You need to go a bit higher to 1650 and maintain it at that level for about 3 months.

    I can't help on the dosage as I've never used a calcium reactor.

    p.s. answer my PM please ;)
     
  4. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,055
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    Each box of epsom salts (500gr) will raise the magnesium in 600L by 84ppm. So you would need about 4 boxes.

    So for every 1 ppm you want to raise by you need 5.9gr of epsom salts.
     
    magman and viper357 like this.
  5. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,055
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    I dosed halve a box in the morning and the other at night. So 84ppm per day. Had no ill effects. I raised mine to 1700- 1800 and the bryopsis took a good few weeks. Remove as much as you can first as it will take up a lot of magnesium. The less there is the less you will have to dose to keep the levels high.
     
  6. Louis Scheepers

    Louis Scheepers

    Joined:
    22 Feb 2010
    Posts:
    353
    Likes Received:
    5
    Location:
    Springs
    I had a very serious briopsis problem, and kept magnesium at 1800 for more than 4 months (with epsom, with magnesium hexahydrate and even with expensive Kent tech M), it did nothing... hope it works better for you, some people did have success with it.

    I added 30ml of epsom salt every day in a 300 liter system. At first your magnesium will stay the same for a couple of days (think it is because the briopsis absorbs it) then after a while it starts going up gradually. You'll have to test every couple of days.
     
  7. Sentari

    Sentari

    Joined:
    15 May 2009
    Posts:
    2,084
    Likes Received:
    6
    Location:
    Weltevreden Park, Johannesburg
    Louis how sure are you that it was bryosis? it might have been GHA. Which it will do nothing to.
     
  8. gaboon

    gaboon Thread Starter

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    Cool thanks. I'm sure I replied yesterday, I'll check now.

    So my little 100g box from Clicks is not gonna cut it:p. Will add it all tonight and get some more tomorrow. Theres only a little bryopsis but want to get it now before it takes over.

    Thanks Marius, where did you get yours from? Clicks only has the 100g B.P grade stuff.

    Louis, are you still battling it? If not, what did you do?
     
  9. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,991
    Likes Received:
    782
    Try pic 'n pay or Makro, they should sell bigger boxes.
     
  10. gaboon

    gaboon Thread Starter

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    Cool, thought it was only available at chemists. Should I premix it or just add to the sump?
     
  11. mandarinman

    mandarinman

    Joined:
    18 Oct 2007
    Posts:
    6,377
    Likes Received:
    70
    Location:
    capetown,durbanville
    dissolve in some tank water and syphon back in over an hour.
     
  12. gaboon

    gaboon Thread Starter

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    Thanks man.

    Will update in a week.
     
  13. scubaninja

    scubaninja

    Joined:
    20 Jul 2008
    Posts:
    6,739
    Likes Received:
    21
    Location:
    Durban
    sheesh that is like nothing! 5.9g for 1ppm? holy cow. What are the other compunds and stuff in the epsom salts going to to do the tank from the 4 boxes you will put in over time?
     
  14. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,055
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    Sulfate goes up quite a bit but that can be rectified with a couple of large water changes once the bryopsis is gone. I got my 500gr boxes from spar or checkers. R10 per box. I just add halve a box to a filter sock and dump it in the sump and let it dissolve on its own.
     
  15. Louis Scheepers

    Louis Scheepers

    Joined:
    22 Feb 2010
    Posts:
    353
    Likes Received:
    5
    Location:
    Springs






    was sure, briopsis is dark green looks like a fine fern leave. Snails and fish dont eat it. My Scopas, Regal tang and Fox face ate the gha as well as most macro's that were in my tank, but didn't touch Briopsis.
     
  16. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,991
    Likes Received:
    782
    Agreed, in an ideal world you want to use a mixture of Epsom Salts (Magnesium Sulphate) and Magnesium Chloride. There is a mixture ratio in a sticky thread in Hennie's forum, called Chemical Equivalents I think.
     
    Last edited: 12 Oct 2010
  17. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,055
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    Problem with magnesium chloride is getting the stuff at a decent price. Pharmacies are just as expensive as what it would cost you for proper additives at the LFS and the chemical suppliers only do 25Kg bags. Around the R150-R200 per 25Kg IIRC.
     
  18. gaboon

    gaboon Thread Starter

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    My salifert MG test kit only goes up to 1500, do other test kits go higher or is there a way to test past 1500?
     
  19. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,991
    Likes Received:
    782
    Do the test as usual but refill the syringe when it's empty and add 1500 to the result.
     
  20. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,055
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    Or get the Elos kit.
     
  21. gaboon

    gaboon Thread Starter

    Joined:
    14 Nov 2007
    Posts:
    2,241
    Likes Received:
    5
    Location:
    Northriding
    Can you explain a bit more viper? The syringe is 1.0ml, 1500ppm MG is indicated when the syringe is empty. How many 0.1 of a ml extra will I need to indicate ±1700MG?

    Hope this makes sense.
     
Recent Posts

Loading...
Similar Threads - Correct dosage epsom Forum Date
Choosing the Correct Heater for your Aquarium General Discussions and Advice 12 Jul 2016
How to choose the correct return pump Pumps and Waterflow 24 May 2016
Correct usage of F/2 Powder General Discussions and Advice 25 Mar 2015
The Importance of correct flow in the marine tank. Idol Marine 16 Jan 2015
The correct usage of an Auto top up unit (ATU). Idol Marine 30 Dec 2014
Selecting the correct plastic for your water drums Test Kits, Controllers, Reactors and Dosers 22 Oct 2013
Correct glass thickness for my cube? General Discussions and Advice 26 Jun 2013