Alk too low CA too high, how to fix?

[meemoo]

My Alk is down to 2.0meq/l and my CA is over 500. How can I bring up my ALk and lower my CA?

 

[Randy Holmes-Farley]

Just maintain the alkalinity with baking soda (at 2.5-4 meq/L), and let the calcium decline on its own.

Are you using Oceanic salt? That will cause high calcium.

This article gives detials on the correction:

Solving Calcium and Alkalinity Problems
http://www.advancedaquarist.com/issues/nov2002/chem.htm