Raising magnesium level

[baruchbl]

I bougt Epsom salt. How much should i add to raise the mg level?

[Randy Holmes-Farley]

Well, it isn't the most recommended way to raise magnesium levels as it can lead to elevated sulfate with a lot of use, but this claculator shows how much to use:

http://home.comcast.net/~jdieck1/chem_calc3.html

This article discusses the issues around Epsom salts:

Magnesium in Reef Aquaria
http://www.advancedaquarist.com/issues/oct2003/chem.htm