what can i use for mag and calcium?
http://reefkeeping.com/issues/2006-07/rhf/index.php
http://www.advancedaquarist.com/issues/april2004/chem.htm
http://reefkeeping.com/issues/2006-02/rhf/index.php
Found under chemistry
It’s a little late in the snow melt season to buy bulk CaCl and MgCl salts, but if you need some i have some extra. the epsom salt, MgSO4 you can buy at walmart, drug store or dollar store. same with the baking soda.