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

86% Recommend this to a friend (104 of 121)

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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  • good salt By dalbert on 5/21/2017

    i have no problems if my parameters need adjusted i do so love it
  • Best salt that I've used and I have use the lot By Ny.78 on 4/25/2017

    I don't know why it's getting these negative reviews I've been using the salt for over two years now I've tried tons of different salt as well as the Red Sea product I use a zeovite reactor and I have an SPS dominated tank as well as a mixed reef tank and fish I must say I don't understand what the issues are maybe they're not mixing it properly but mine makes his clear within two 2 hours like I said used to have problems with the Red Sea with alkalinity but now I have a nice steady eight
  • BRS Recommended? By Josh on 4/24/2017

    I bought the big box on the Black Friday sale based on the BRS recommendation since I was about out of my Red Sea Pro. I've used this now nearly 6 months, and my alkalinity has been a constant issue. Period! Stonies are stressed, I'm having to buffer heavily, which is real bad, and it's thrown my system off totally! Tested yesterday before water change, was 8.0, did a 5ga change on about 30ga volume, and took a sample to my lfs later in the day, it was 7.0! Avoid this stuff! The only positive I can give it is it mixes super easily and clear. I've never had debris, cloudiness or anything. But, all in all, I'm heading right back to RedSea Pro and washing my hands of this stuff, and I still have a small bucket left (RedSea little bucket full). Maybe it'll be a better weed killer around the yard.
  • Totally awesome By Smoking reefs on 4/18/2017

    This salt is best in market being synthetic it's totally medical grade product. How someone does not like this I'm clueless. I have no reside compared to other brands
  • Slimy By Randall on 4/15/2017

    Overall I guess I'm pleased with it, but it leaves a slimy residue on the glass, and it seems cloudy. Otherwise, it's reef salt...
  • Cloudy takes 2 days to clear By kv on 3/31/2017

    I can't figure out why some people have great success and others have this cloudy residue problem....
    I will not buy this again.
  • drops levels By luke on 3/25/2017

    doing water changes actually drops my magnesium and messes up my other parameters. doesnt mix well. some debris
  • Decent, but pricey salt By JShep5 on 3/5/2017

    I have used just this salt in a new 125g build. I have had issues with levels, precipitate, residue and debris in the mix.
    I have used 4 boxes of this mix. I mix using heated, RODI water and mix to 1.025sg.
    Each time I get residue in my mixing container, on my pumps and heaters in the sump and display. I also get precipitate that is present in the water for 2 days after adding to the display. The levels are not good either. Dkh is 8~, Cal is 380 and Mag is 1280.
    More of a concern is the debris. In the first two boxes there were small pieces of white plastic. In the recent two boxes, there were small pieces of brown paper that ended clogging my mixing pump at one point.
    BRS has been great about the issues and refunded me for my recent purchase. However, HW has been silent even with two emails and anot attempted phone call.
    I will be switching to Red Sea Coral Pro.
  • Hw marinemix By Nick on 3/1/2017

    Swithed to this salt a while ago. Im 4 boxes in and the parameters have been almost 100% the same and consistent between the boxes. You can tell when mixing the difference between synthetic salt and regular. This stuff disolves and clears up very quickly. I have 45 gallons mixed up all the time and have my DOS hooked up changing 3 gallons daily. The tank loves this stuff.
  • Excellent Salt By Dennis on 2/5/2017

    I decided to use this mix on a new tank after watching the BRS 160 build. No complaints here.
  • Great salt By John on 1/28/2017

    I have been using this salt, Reefer, for about 1 year now. I love how easy and quickly it mixes. The salt cloud clears quickly and the salt parameters are very consistent. I also find that my mix tank stays cleaner much longer than the other salts that i have used. My corals love it and appear very happy.
  • Good parameters but issues By Design1stCode2nd on 1/28/2017

    I was using standard Instant Ocean but had a number of issues with not enough of the correct minerals so I tried HW. First the good, HW has excellent parameters which is what I wanted.

    Now for the bad, I have to use 2-4 cups more salt per 20g to get 1.026sg.
    It leaves a heavy precipitant layer in my mixing barrel coats my pump and heater where Instant Ocean did not. I have to throw out 5%-10% as it doesn’t thoroughly mix
    Came in large rocks that had to be broken up instead of loose salt.