Using Epsom salt as Magnesium Sulfate?

[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)