Reef Chemistry Calculator for Alk, Cal, and Mag

[EyeReef]

Good link to see how much ALK, CALICIUM, and MAG (using different products) you need to add to raise to reach a certain level.
http://home.comcast.net/~jdieck1/chem_calc3.html

 

[5ft24]

Link has changed

http://reef.diesyst.com/chemcalc/chem_calc3.html

 

[711Tonyst]

Reef Chemistry Calculator use it all the time to fine tune

 

[ClamMania]

http://reef.diesyst.com/chemcalc/chemcalc.html
Great site to use