HW-Marinemix Reefer Salt Mix 160 Gallons - HW Wiegandt

hw-Marinemix Reefer Salt Mix
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HW-Marinemix Reefer Salt Mix 160 Gallons - HW Wiegandt

89% Recommend this to a friend (89 of 100)

SKU: 208270
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Quick Overview

Why does BRS recommend this?

We have been using HW salt in our office tanks for a while with great success.  The salt is very consistent and mixes quickly and clean.  With no unnecessary added chemicals that most salt mixes add to appear clean, HW has passed the test, and standards that many public aquariums and high end displays require in a salt mix.

hw-Marinemix Reefer Salt Mix is a high purity blend of salt mix produced using a synthetic process and does not contain any recycled components. Created specifically for the reef aquarium and the constant demand for minerals, trace elements, amino acids and biocatalysts. Provides enhanced calcium and magnesium concentrations for vigorous growth of corals.

  • One of the first synthetic salt mixes ever produced

  • No anti-caking agents

  • No chemical or environmental pollutants, no nitrates, phosphates or silicates

  • Natural, stable pH and optimal alkalinity

  • Contains no EDTA which can chelate many necessary trace elements

  • Optimized with amino acids and organically stabilized iodine - great for the reef hobbyist

  • Makes approx. 160 Gallons of solution at 1.024 salinity


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Product Questions

I am currently using tropic marin actif salt mix. If I wanted to switch to this hw-Marine Mix, can I just switch for my next partial water change or do I need to make the transition more gradual?
Question by: Bryan on May 8, 2016 8:36:00 AM
No answers yet. Be the first to answer the question!
How much do I use for this 30 gallon tank? I tried to find the direction but nothing for mixing direction per gallon.
Question by: Max McLaughlin on Jun 28, 2016 2:48:00 PM
Great question!
Salt mixes typically do not include an exact amount to use rather you will use a refractometer and slowly add salt until you reach 1/026 SG or 35 PPT. Typically you can start with 1/2 cup per gallon and increase from there.
Answer by: Connor (Admin) on Jun 28, 2016 5:56:00 PM
Is this packaged in one bag in the box?
Question by: Steven on Jun 14, 2016 8:42:00 PM
Great question!
This will be an individual bag with all of the salt. Feel free to let us know if you have any further questions.
Answer by: Connor (Admin) on Jun 15, 2016 10:32:00 AM
if i use this salt mix will i need supplements?
Question by: johnathan on May 23, 2016 2:20:00 PM
Great question! HW is optimized with amino acids and organically stabilized iodine, it contains a proprietary blend of trace elements so there really isn't a need for additives.
Answer by: Carter (Admin) on May 25, 2016 3:19:00 PM
the details of this salt state that

BRS recommends using a complete salt mix, to save money and time on testing supplies and major element adjustments. Upon BRS analysis - hw-Marinemix Reefer contained Calcium at 445-450 ppm, Alk of 9.0 dKH, Magnesium at 1380 ppm.

at what salinity was this tested at?
Question by: scott fernandez on Aug 8, 2015 10:30:00 PM
Great question, this was tested at 1.026 SG or 35 PPT. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Aug 10, 2015 4:41:00 PM
I can't seem to find the composition of the ingredients of this salt. Do you have the list of the ingredients/percentages etc.? Thanks.
Question by: Tariq on May 17, 2016 8:00:00 AM
Upon BRS analysis - hw-Marinemix Reefer contained Calcium at 445-450 ppm, Alk of 9.0 dKH, Magnesium at 1380 ppm This is an entire box mixed at a 1.026 SG
Answer by: Connor (Admin) on May 18, 2016 6:45:00 PM

Full Details

hw-Marinemix Reefer Salt Mix is highly used for reef hobbyists across Europe. hw-Wiegandt has been producing aquarium salt for over 50 years experience producing salt mix, boasting its professional use in public aquariums, universities and research facilities since 1968.


hw-Marinemix is produced under strict quality control guidelines using a biocatalyst system based on the analysis of natural seawater.


BRS recommends using a complete salt mix, to save money and time on testing supplies and major element adjustments. Upon BRS analysis - hw-Marinemix Reefer contained Calcium at 445-450 ppm, Alk of 9.0 dKH, Magnesium at 1380 ppm.


Mixing Instructions - Add 1/2 cup of HW Reefer Salt to 1 Gallon of RO/DI water. Let it mix until it is clear and test the specific gravity of the solution. Add salt or water as needed to meet your desired salinity.


20 Kg box



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  • Messed up my tank By Eric on 11/24/2016

    I switched from instant ocean to this for my water changes and my tank almost crashed. The major elements were matched in my tank before switching to this salt but all my Acros got STN shortly after switching. Also killed a hammer coral.
  • Great Salt By Eric on 11/2/2016

    Mixes clean with consistent parameters. None of the brown anti-caking sludge like with instant ocean.I like how the alkalonity is lower at 9 than some of the other mixes.
  • White residue By Jerzyray on 10/20/2016

    I bought a box of this salt to set up my new reef tank. I bought an new rodi new food grade bucket power head and heater just for mixing. No matter what I try it get floating particularly on water surface and white residue all over power head and heater. I guess I will try the red sea salt next
  • 2nd time around By Badabing on 10/17/2016

    2nd time using this, first time it always made my water cloudy, this time not, I check before my water change, alk-8.5-9.0 that is awesome, only drawback is that the bag is like a giant block of salt, I have to scrap it to brake it up, not really that big of a deal, so far no negative results and been doing 20% water changes a week for a small nitrate increase that I have!!!!
  • Different formula ? By Reef Salt on 10/17/2016

    Aquarium parameters have changed since my last box of this product will not be getting this product again, started off good but it looks like they changed it. I've been using it for a year and a half. No more!
  • Best salt out there By Sgt Harold on 9/27/2016

    This salt is so stable and easy to mix. No cackling or crud in your mixing containers .
  • Excellent Product ave been using for 2 years By rblarmer on 9/26/2016

    this salt mixes fast is very stale and my tank has been thriving for 2 years with it. i have no issues with PH or any other parameters that I am aware.
  • Updated review. By Benjamin on 9/2/2016

    After replacing the filter cartridges on my BRS 6 stage+ RO system and making fresh RO, this salt mixes clear and does not precipitate like previously. I do feel like it has alot of floating particles on the surface after mixing. Hence the 4 stars.
  • Good salt By Mark on 8/29/2016

    Easy to mix. Params on this salt seem on point every time (alk, calcium, etc). The one negative though is this stuff likes to clump up.
  • Will not mix clear. By Benjamin on 8/28/2016

    No matter how I mix this stuff. Massive amounts of floating particles and will not mix clear. Going back to RSCP immediately.
  • Not for me By Tom on 8/13/2016

    After using this salt mix for 3 months (2 boxes) I've switched back to Red Sea. The good - This salt does mix up fast, clear with no residue, and to advertises parameters. But for some reason I couldn't keep a stable pH. After about a month I started seeing some corals recede. By month 3 I had lost several colonies including my clam that I had for 4 years.

    Some additional info - Tank is a 120g with a 30g sump. Water changes are done weekly. To see if I could get the pH up I tried daily water changes for 5 days. With this salt my pH was between 7.6 - 7.8. I do use a 2 part solution but no other additives. ORP with this salt was also low, in the 250 range. Skimmer foam wasn't as thick and produced less skimmate. No fish or soft corals were lost. All livestock issues were with LPS/SPS corals and my clam.
  • Great product By Robsyp on 8/9/2016

    Switched from reef crystals and I'm very happy that I did.