Magnesium Cost

I use Dowflake (MgCl) snow melt in a 50lb bag for $22 and Epsom Salt (MgSO4) from San Francisco Salt Co at $25 for 20lb bag. Randy Holmes Farley has instructions on how to mix them.

When I had 600+ gallons of saltwater in the house, I would buy these and then sell smaller amounts at cost to fellow reefers in my local club. A one gallon bottle for $4.
 
I use Dowflake (MgCl) snow melt in a 50lb bag for $22 and Epsom Salt (MgSO4) from San Francisco Salt Co at $25 for 20lb bag. Randy Holmes Farley has instructions on how to mix them.

When I had 600+ gallons of saltwater in the house, I would buy these and then sell smaller amounts at cost to fellow reefers in my local club. A one gallon bottle for $4.
I was looking for it all on amazonwith no luck.
 
Look for 'snow melt' products. Most are like Dow Flake which is a CaCl product. You just want to make sure it's close to 100% pure. Dow Flake lists it's ingredients as 96% CaCl, but the other 4% is H2O. I think many people use a Prestone De-icer product too.

Magflake (or Mag Flake) can be harder to find. Especially if you don't live in a colder climate. I'm in SW Florida and I had a friend in Ohio bring a few bags down (for me and a few friends) when he came down for a visit. But more recently I found that a couple of companies that sell supplies to tennis courts carry both Dowflake and Mag Flake. They use it to keep down dust on clay tennis courts. And some arenas stock it for the same purpose and use it when they run indoor motocross or monster truck events.
 
BRS has a video testing the contaminants of magnesium. In short, it's difficult to get a pure magnesium source which is why its pricey.

 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%

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