AF Reef Salt, mg reading 1600+ppm

Discussion in 'Aquaforest' started by kinetic, Jan 12, 2018.

  1. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    AquaForest Reef Salt
    Salinity: 1.026
    Temp: 78F
    Magnesium: 1600+ppm
    RO/DI Water TDS: 0

    That's in a newly mixed batch (within 1 hour of mixing).

    It's too easy to blame the test kit. But I'm using a Red Sea test kit that came with the reef tests. I know it can read about 20-50ppm higher than other test kits, but this is way off. I consistently use 0.9ml of the titration fluid in both my display tank water and my newly mixed water. Two of my buckets read the same.

    I'll get my water tested with other people and the LFS as well, but let's assume it's way higher than advertised, what can I do? I have three full buckets of AF Reef Salt that I can't use. Would AF refund me / replace the buckets?
     
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  2. Ocelaris

    Ocelaris Valuable Member R2R Supporter R2R Excellence Award Build Thread Contributor NJRC Member

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    Get a salifert kit for magnesium. My red sea was always wildly off, like same readings as you, and with the salifert it came in at 1350.
     
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  3. niQo

    niQo Member

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    I have AF Reef Salt as well, my salifert test kit indicates 1500 for magnesium. It kept rising after a water change and I never dosed any Magnesium. So I am not really surprised.
     
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  4. niQo

    niQo Member

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    Double Post
     
  5. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    Strangely, everyone near me (there are a lot of people) all use Red Sea test kits. I ordered a salifert kit. It might take awhile to get to me, but I'll test it then. Nothing in the tank is dead, so I'm just hoping my kit is way off.

    What test kit(s) did you use?
     
  6. ycnibrc

    ycnibrc STAG HORN DOMINATE REEF R2R Supporter SCMAS Member Build Thread Contributor

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    There is no side effect for coral with 1600ppm mag. Actuslly it might help with your algae control.
     
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  7. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    Interesting. How does it help with algae? I have a bit of film algae throughout my tank.
     
  8. tommyhere

    tommyhere Valuable Member Build Thread Contributor

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    My af reef salt is at 1550. I'm not complaining though a little more than a year I got a batch of 1200. Big improvement. But a little highs not gona hurt much
     
  9. ycnibrc

    ycnibrc STAG HORN DOMINATE REEF R2R Supporter SCMAS Member Build Thread Contributor

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    Bryopsi treatment is to raise mag level to 1600 - 2000ppm
     
  10. niQo

    niQo Member

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    Just Salifert
     
  11. Perry

    Perry Well-Known Member R2R Supporter Gold Sponsor

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    FWIW,
    Let's say you maintain 1300 as your preferred level, and let's say you did a 20% water change? Your total mag would only rise to 1360. Depending on corals kept in the tank, this may be close to your weekly consumption, so in this case, you might not need to even dose mag. Cheers :)
     
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  12. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    I just tested everything in my tank again. This time I used both Red Sea and a brand new Salifert test kit for magnesium. It's proven. The salt mix is super high in magnesium.

    Brand new batch of water

    Salinity 1.026
    Temp: 78 degrees Fahrenheit (both a coralife digital therm, and a mercury based therm)
    Magnesium: 1680ppm. Red Sea shows 0.85 tritation liquid used, so if I look at 0.425 and double it, I'm looking at about 1680ppm. Salifert I used the entire 1ml vial, and it still was purple. The highest it goes is 1500ppm. So I'm guessing my magnesium is sitting right around 1600ppm.

    @Aquaforest It can't be true that both my test kits are wrong. What's next? I have 3 buckets of salt left...
     
  13. Aquaforest

    Aquaforest Active Member R2R Supporter Gold Sponsor

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    Hello,
    To test your salt we need to have this salt in our laboratory. Is this possible to send sample of salt to our distributor in Orlando?
    In PM I will send you address details.
    We are testing all batches of salt on ICP-OES before packing - 3 separate samples per batch are collected during the production stage for testing.

    Best regards,
    Aquaforest
     
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  14. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    Yup, send me the details.

    I believe you guys when you test the salt before packing. But this bucket is reading 1680ppm on one kit, and over 1500ppm on another. So who knows what happened. Can I send you samples from all 3 of my full buckets?

    I also notice that my newest 2 buckets have metal handles instead of plastic ones. Does that indicate anything to you?
     
  15. Aquaforest

    Aquaforest Active Member R2R Supporter Gold Sponsor

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    PM sent.
     
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  16. Rakie

    Rakie Federal Coral Reserve R2R Supporter R2R Excellence Award SCMAS Member Build Thread Contributor

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    That's an old wives tale, based on old school Kent Tech-M, what killed the bryopsis was elevated levels of Lithium that was in the old Tech-M, that's why the new Tech-M doesn't kill bryopsis.

    It doesn't.

    There's unfortunately been a ton of people who've raised mag to no avail. I used the old tech M a long time ago and it worked, then tried another mag and it had no impact. Total bummer.
     
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  17. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    More findings:

    I made two new batches of water, with two different buckets of AquaForest Reef Salt. These were purchased pretty recently (they have the new lid and metal handles). Again, 1680ppm on my Red Sea test kit, and off the charts completely with my Salifert test kit.

    I made sure my refractometer was calibrated with two different calibration solutions.

    At least it's consistent. But it doesn't seem like this is isolated to one bucket. All three buckets I currently have, purchased over a 5 month period (give or take), all have 1680ppm magnesium in a newly mixed batch. I find it to be a pretty insane coincidence.

    Anyone else use Aquaforest Reef Salt? Can you test your Mg with your next batch of salt?
     
  18. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

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    Weekly consumption of magnesium is only going to be a few ppm. At most, it is about 1/10th of the calcium depletion rate.
    A measured depletion rate of 60 ppm magnesium per week is test error.
     
  19. shred5

    shred5 Valuable Member R2R Supporter Build Thread Contributor

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    There are several problem and the first is it is hard to mix salt to consistency. Refractometer calibration solutions are so widely off lately. I have several bottles all measuring different. So even if you get the salt exactly right now you have the test kits and hobby test kits have a margin of error, I mean they are hobby kits. But I have had several Salifert test kits test way of from each other. But again 1/2 a drop different can make a difference in the reading. Even after several test they are off from each other and by allot, question is what one is right. If you find a odd reading you have to try another kit or even better another brand.


    That said magnesium kits are hard to use because of the slight color change and amount of stuff added gives more room for error. I find Red sea kits best for most but not for magnesium. Again most things only need to be close and not exact, more important is stability. Just lately can not believe the difference in calibration solutions for refractometers.

    I have bought some AF salt and it has always tested rather well for me.
     
    Last edited: Jan 19, 2018
  20. kinetic

    kinetic Well-Known Member Build Thread Contributor Partner Member 2018

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    Everything you say is true, and what others have confirmed. You may have missed it, but I recently tested multiple times, with multiple tests from both Red Sea and Salifert. I also calibrated my refractometer with two totally different calibration solutions. They are at least ballpark, because I weigh my salt and water to the specifications of AF's directions, and it's pretty much spot on.
     
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