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hw-Marinemix Professional Salt Mix 160 Gallons

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HW-Marinemix Professional Salt Mix is a high purity blend of salt mix produced using the synthetic process and does not contain any recycled components. Uses high-grade materials to match natural seawater while providing natural calcium and magnesium concentrations to match natural seawater.

  • 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
  • Used by major universities, public aquariums and laboratories across Europe
  • Makes approx. 160 gallons (600 L) of salt water


Specifications: (when mixed to 35ppt)

pH - 8.1-8.3

Alkalinity - 8.7-9.7 dKH

Potassium - 385-420 mg/l

Calcium - 400-440 mg/l

Magnesium - 1240-1320 mg/l

Chloride - 18700-20000 mg/l


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.


20 Kg box with Resealable polythese bag

More Information
UPC 4014246210204
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Product Questions

I received this product the other day. I mixed it up to a salinity of 1.024. There is a white filmy residue all over my mixing container and power head. Is this normal? Is it harmful to fish?
Question by: Kristin Courtney on Apr 19, 2016, 7:33 PM
Great question!
It is very common for a white residue to form on the container and powerhead. This is precipitation and is not harmful and often can be washed off and dissolved into the salt mix. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 26, 2016, 12:52 PM
how much salt per gallon to reach 1.026?
Question by: Lori Bryant on Mar 26, 2016, 10:52 AM
Great question!
It will vary and you will want your refractometer to find the correct amount however typically it is around 1/2 cup per gallon. Feel free to let us know if you have any further questions!
Answer by: Connor on Mar 28, 2016, 11:40 AM
How many gallons does this make
Question by: adam on Jun 9, 2014, 7:23 AM
It will depend on the salinity you mix it to but it will make 158g if mixed to a specific gravity of 1.024
Answer by: Bulk Reef Supply on Jun 9, 2014, 7:23 AM