I haven't rolled my IO Sea Salt buckets for over a year, but that may change ....

[Myka]

Originally Posted by gregzz4

How in the world am I supposed to keep my tank semi-stable when a 15% WC will take my tank from for example;
7.3
430
1380

To;
8.4
439
1350

The simplest answer is to start using a brand of salt that has parameters close to what you're aiming for in your tank. High alkalinity was one of the reasons I switched away from using IO in reef tanks several years ago. I still use it on all my fish only tanks though. There isn't anything wrong with using IO in reef tanks, but if you want to keep low alkalinity it is in your reef's best interest to use something else to prevent fluctuation.