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Originally Posted by Tom R

I find the use of this Reef Calculator to be valuable when trying to determine the amount of chemical required to bring my target levels back into line.

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

Tom R

I use the flash version in the link and after adding, tests to the level I want.

btw the Mg mix I got from LSM already has the Espon Salt mixed in.