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

84% Recommend this to a friend (107 of 127)

SKU: 208270
In Stock: 363
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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


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.

To mix by weight - Add approximately 1lbs of HW Reefer Salt every 3.6 gallons of RODI 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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  • Awesome Salt Mix By Me2rowdy on 10/11/2017

    I currently have a 16 gallon AIO Nano tank. It has been running exclusively with this salt for 2 1/2 years now and my readings are spot on. I had a few LFS even ask me what kind of salt I use when they do a free test reading for me. I love this stuff.
  • Too many particulates floating in it By Craig on 10/11/2017

    I mix up 7-10 gallons per week. I've used Reef Crystals, Tropic Marin Pro Reef, Aquaforest Reef Salt and now... HW- Marine mix.

    HW is the worst so far. There is so much crap that doesn't dissolve and just floats around in the water. I use a brute trash can and pump to mix and usually let it set for at least a day. Doesn't matter. I'll use up this box...but I won't buy it again.
  • Great product By Arrick on 9/18/2017

    This is a great salt. It is a little pricey but you get what you pay for. I have been using it for almost 2 years and it is very consistent and mixes fast and clean.
  • Does not maintain Alkalinity By Saltydog on 9/10/2017

    Bought this salt on BRS recommendation that is mixes easily and doesn't leave a brown crust in mixing vat. It does mix fast and clear, but maintaining alkalinity takes twice as much dosing and maintaining Ph is a constant struggle.
  • Confused about the poor reviews here. By Albert on 8/1/2017

    I switched from the Red Sea Pro to the Red Sea Blue bucket and then to this. I liked the pro before when I had only a few softies and fish because it was enough added Alk to hold over my tank until the next week. Then I started dosing and wanted to start with a more natural level of Alk/Calc so I went to the blue bucket. It was fine. Then on a whim I decided to try this salt and I have to say I like it even more. The corals seemed to respond to it, which has never occured to me by simply changing salt. My tanks parameters are very close to what this mixes to, so doing a water chage doesnt upset my tanks balance. I'm currently slowly lowering my alk parameters from 9 to 8 since my tank has been running unusually clean with basically zero nitrate/phosphate despite being overfed and no GFO or carbon dosing (its the overpowered refugium light I added I think sucking up the nutrients, I used a Mars Hydroponics LED from amazon in case your curious, its an absolute monster). Once the Alk is running at 8 instead of 9 I will have to figure out if this salt is still ok to use. I may have to switch to something with lower Alk, or simply program my doser to turn off for a day after water changes. The other thing I like about this salt is that it mixes EXTREMELY fast. I can mix 20 gallons for my water change in like 10 minutes. I let it age for an hour, but I dont think its necessary. It also has not left any residue in my Brute WC container, so thats kind of mysterious that some are complaining about that..
  • Update...Not so good By Adam on 7/27/2017

    When I first started using this salt I was extremely pleased with the results and consistency of tge product. Now halfway through my third box of this salt mix, not so impressed anymore. Noticed I was slowly increasing the amount of salt mixed to achieve desired readings. Also noticed it was leaving a brownish residue in my primary mixing bucket. It also almost caused a catastrophe as it "slimed" my filter media making it hard for the water to pass through. Initially I thought there must be something wrong with my RO/DI system and replaced the 3 pre filter, RO membrane, and DI resin. Even after changing the filters in the RO/DI unit and thoroughly washing out my primary mixing bucket, this salt mix would form a slimy residue on the filter floss and media totally clogging up my system. Not sure what the problem was, I even drained, cleaned, and refilled my ATO container with fresh new water. This slim issue was driving me crazy. So not only was I dealing with a slim issue, but the parameters of a newly mixed salt batch was totally low as well. So I stopped using this product and have gone back to RedSea Coral Pro and dropped this review from 5 stars down to 2 due to inconsistency in this product. Maybe I just got a bad batch, but not willing to pay this money in hopes for a good batch of salt mix.
  • 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.


Ask a question

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