Using Epsom salt as Magnesium Sulfate?

[Reef-Geek]

Thanks guys.
More questions, how does the grade affect and how do you know the grade?

also where to get Magnesium Chloride(that can be used for reef tanks) locally other than LFS?

[Potatohead]

Originally Posted by Reef-Geek

also where to get Magnesium Chloride(that can be used for reef tanks) locally other than LFS?

You can use driveway de-icer but I've typically bought stuff for the aquarium trade because it's not very expensive and probably more tightly controlled (or maybe not, lol). I bought this recently;

https://www.amazon.ca/Aquaforest-590...rest+magnesium

For me it will last probably a year or more, for pretty darn cheap. If you need more they also make a 4 liter version, and JL also has their own branded stuff (ReefCrest)